All articles related to Acronis Cyber Protect 15.

User guide
Command-Line Reference

FAQs & Hot Topics

List of support options for Acronis products
Acronis Cyber Protect 15: FAQ
Acronis Cyber Protect Home Office and Acronis Cyber Protect 15: required security updates for Windows 7
Acronis Cyber Protect 15 Update 3: Perpetual licenses are not visible in console after Management Server registration
Acronis Cyber Protect 15: Impossible to run or apply backup plan after update to Build 28405: "The protection plan cannot be applied or updated as the device has no license"
Acronis Cyber Protect 15: Licenses disappear from on-premise Management Server after re-registration
Acronis Cyber Protect: Backups to Cloud fail with "The cloud storage quota is exceeded. Further backups will fail" even after storage quota was increased
Acronis Cyber Protect 15 Update 3: Virtual host license cannot be assigned to both host and virtual machines
Acronis Cyber Protect 15: "License usage" tab is missing in Cloud console

Security Updates

For information on security updates, visit https://security-advisory.acronis.com

Licensing, Requirements, Features & More

How to download Acronis bootable media ISO
Firewall settings for Acronis products
Acronis Cyber Cloud: access ports and hostnames
Antimalware detection test files and URLs
Acronis Cyber Protect 15: "Plans" tab is not available in Standard edition
Backup archive compatibility across different product versions
Trial version limitations of Acronis products
Acronis Cyber Protect Home Office and Acronis Cyber Protect 15: required security updates for Windows 7
Acronis Cyber Protect Cloud, Acronis Cyber Backup: required managed machine service user rights
How to find the serial number of your Acronis product
Difference between Acronis Cyber Protect 15 and Acronis Cyber Backup 12.5
Acronis Cyber Protect 15 licensing
Acronis Cyber Backup Advanced: Supported Virtual Tape Libraries
Acronis Cyber Protect: Disk backup and Microsoft Exchange or SQL backup are performed in queue
How to activate boxed versions of Acronis products
How to check whether your license is perpetual or subscription
Acronis Cyber Protect Cloud, Acronis Cyber Backup: support of Hyper-V clusters
Acronis Cyber Protect: KVM support
Acronis Cyber Protect Advanced, Acronis Cyber Backup Advanced: Acronis Hardware Compatibility Tool for tape devices
Acronis Cyber Protect 15, Acronis Cyber Backup 12.5: additional tape is required for retention rules to work if one backup per tape is used
Windows 11 support in Acronis products
Acronis Software: free VMware ESXi support
Acronis Cyber Protect 15 upgrade table
Acronis Cyber Protect Cloud: 'version 12' backup format (archive3)
Acronis Cyber Protect Advanced, Acronis Cyber Backup Advanced: Tape Support
Acronis Cyber Protect 15: Windows services and processes
Ext4 Support in Acronis Products
Acronis Cyber Protect 15: licensing and upgrade/downgrade FAQ
Retention rules: how and when they work
Receiving Upgrade Licenses for Acronis Business Products
Difference between Acronis Cyber Protect 15 and Acronis Cyber Protect Home Office
Available languages of Acronis products
Third-party software used in Acronis Cyber Protect 15
Acronis Software: Advanced Format Drives Support
Acronis Cyber Protect, Acronis Cyber Backup: agent-based and agentless backup of virtual machines
macOS Big Sur (11.0) support in Acronis products
Acronis Cyber Protect, Acronis Cyber Backup: ESXi configuration backup
Acronis Backup software: NFS shares support
Acronis Cyber Protect: LDM volumes support
Acronis Cloud Storage: list of supported countries
Acronis Cyber Protect 15: Linux components, services, and processes
Acronis Cyber Protect: compatibility with Windows BitLocker
Windows 10 support in Acronis products
Acronis Cyber Protect 15: How to activate free Cloud storage per Workload
Acronis Cyber Protect 15: how compute points are consumed in Disaster Recovery Add-on
Acronis software: Windows mapped network drives are not supported
Backup Algorithm in ESX Environment
Acronis Cyber Protect Cloud, Acronis Cyber Backup: vCenter Server Virtual Appliance support
Acronis Cloud security and privacy
Acronis Cyber Protect 15, Acronis Cyber Backup 12.5: Microsoft 365 protection

How-tos

How to download Acronis bootable media ISO
Acronis Cyber Backup 12.5 and Acronis Cyber Protect 15: how to collect system information
Acronis Cyber Protect, Acronis Cyber Backup: updating to the latest build
Upgrade to Acronis Cyber Protect 15
Acronis Cyber Backup 12.5, Acronis Cyber Protect 15: how to create a bootable media
Acronis Cyber Protect, Acronis Cyber Backup: How to change MMScurrentMachineID and InstanceID
How to find the serial number of your Acronis product
Acronis Cyber Protect: how to increase quota or extend your subscription
Acronis Cyber Protect Cloud, Acronis Cyber Backup: How to run script inside virtual machine during agentless backup
Acronis Backup software: Installation on a Read-Only Domain Controller
How to activate boxed versions of Acronis products
Acronis Cyber Protect 15, Acronis Cyber Backup 12.5: how to manually add a machine to management server
Acronis Cyber Protect 15: how to export and import protection plans
Changing Keyboard Language in Acronis Bootable Media
Acronis backup software: Using custom SnapAPI Module in Linux
Acronis Cyber Protect: How to configure static routes for Virtual Appliance
Acronis Cyber Protect 15, Acronis Cyber Backup 12.5: How to configure static IP on Acronis Cyber Backup Appliance
Acronis Cyber Protect, Acronis Cyber Backup: How to configure DatevNet proxy settings
Acronis Cyber Backup: Backing up IBM Lotus Domino Server
How to capture Wireshark logs on scheduled backups via pre/post-commands
Acronis Cyber Protect Cloud, Acronis Cyber Backup: Restoring to Dissimilar Hardware with Universal Restore
Acronis Cyber Protect 15: How to download a free upgrade
How to enlarge the root file system of a Virtual Appliance
Acronis Cyber Protect: how to change keyboard layout in Virtual Appliance
Acronis Cyber Backup: How to create or update Acronis Bootable Media with closed-source kernel modules
Acronis Cyber Backup Advanced: Changing the TapeLocation Folder
Acronis Active Protection: FAQ on missed ransomware attacks
Acronis Cyber Protect, Acronis Cyber Backup: Backing Up MySQL
Receiving Upgrade Licenses for Acronis Business Products
Acronis Cyber Protect: How to increase Cloud Storage quota
Business Products: how to check if your support program is valid
How to turn off the automatic renewal of a subscription
Acronis Cyber Protect, Acronis Cyber Backup: How to back up domain controller
Acronis Cyber Protect 15: How to deploy and update Agent for VMware (Virtual Appliance)
Acronis Cyber Protect 15: how to assign Virtual Host license when installing agents inside guest OS of virtual machines
Acronis Cyber Protect, Acronis Cyber Backup: Changing Temp Files and Folder Location
Acronis Cyber Protect 15, Acronis Cyber Backup 12.5: Maintenance
Acronis Cyber Protect, Acronis Cyber Backup: all or some VMware virtual machines do not appear in the console
Acronis Cyber Protect 15: How to start a trial version
Acronis Cyber Protect 15: How to perform remote installation of agents in environments with Linux-based Acronis Management Server
Acronis Cyber Protect Cloud, Acronis Cyber Backup: How to disable VDDK transports on agent
Acronis Cyber Protect: Migrating Machines to Amazon EC2 and Microsoft Azure
Acronis Cyber Protect Cloud, Acronis Cyber Backup: Backing up to removable devices with regular drive swaps
Acronis Cyber Protect 15, Acronis Cyber Backup 12.5: How to clone disk using bootable media
Acronis Cyber Protect 15: How to update Acronis Virtual Appliance for Scale/Agent for Scale Computing HC3
How to collect procmon logs as part of backup plan using scripts in pre/post commands
Acronis Cyber Protect Cloud, Acronis Cyber Backup: how to restore files from backups of NTFS volumes with Windows native Data Deduplication
Acronis Cyber Protect: how to add new administrator account to Acronis Cyber Protect appliance
Acronis Cyber Protect: how to set up shutdown after backup
Acronis Cyber Backup, Acronis Cyber Protect: tape erase operation fails with "The parameter is incorrect" error

Technical Questions & Known Solutions - Installation, Update

Acronis Products: Installation Fails with "An error occurred during the installation of assembly" "Microsoft.VC80.CRT,publicKeyToken"
Acronis Cyber Protect: Issues when using backup agents newer than 15.0.26321(C21.01 HF1) on OSes related to Windows 7, when the SHA-2 code signing support patch/update from Microsoft is not installed
Acronis Cyber Protect, Acronis Cyber Backup: Warning "The KB940349 update is not installed on this machine" during agent installation on Windows Server 2003
Acronis Cyber Protect Cloud, Acronis Cyber Protect: "More than one Agent for Hyper-V is selected. Simultaneous update of multiple Agents for Hyper-V is not possible" error when attempting to update several Hyper-V agents at the same time
Acronis Software: Installation fails with "MainEngineThread is returning 1603" or "MainEngineThread is returning 1618"
Acronis Cyber Protect: Installation in Linux finishes with "Failed to build the SnapAPI kernel module"
Acronis Cyber Protect 15: Agent installation on 32-bit machine fails with "Failed to download installation file 'resource.xml' from the server."
Acronis Cyber Protect: Snapapi fails to build on CloudLinux 7 with a hybrid kernel
Acronis Cyber Backup: installation on ARM-powered PC fails with "This app can't run on your PC"
Acronis Cyber Protect 15 remote installation of the Acronis Agent on the Domain Controller fails with error: "The operation has failed with result '1603'"
Acronis Cyber Protect, Acronis Cyber Backup: remote installation on Windows OS Domain Controller fails with error "The operation has failed with result '1603'"
Acronis Cyber Protect, Acronis Cyber Backup: device does not appear in backup management console after installation
Acronis Cyber Protect 15: Remote installation on Windows XP 32-bit machine fails with "Failed to launch remote installation support service"
Acronis Cyber Protect 15 Build 27009: remote installation fails with "Failed to verify the security certificate of the file"
Acronis Cyber Backup, Acronis Cyber Protect: Installation on Debian Fails with "Cannot execute binary file"
Acronis Cyber Protect: How to change default port of mms.exe process (Acronis Managed Machine service)
Acronis Cyber Protect 15: Attempt to deploy Virtual Appliance for Scale into the Scale Cluster fails with: "msg": "Failed to import Scale VM: Failed to import scale vir domain: EValidationError
Acronis Cyber Protect: installation fails with "This distribution of Acronis Cyber Protect Agent can only be installed on Mac with Apple Silicon CPU"
Acronis Cyber Protect 15: Deployment of Agent for Scale Computing HC3 fails with "Failed to download the virtual appliance. Check the internet connection on host or download the file."
Acronis Software: Installation fails with "The Windows Installer Service could not be accessed"

Technical Questions & Known Solutions - Licenses and Quotas

Acronis Cyber Protect 15: registering Management Server fails with "Management server blocked" after offline unregistration
Acronis Cyber Protect 15: Offline activation fails with "Registration file is already in use"
Acronis Cyber Protect 15: Impossible to unregister Management Server after reinstallation or unallocate licenses from it
Acronis Cyber Protect 15: Management Server activation fails with "An error occurred during registration" if 2FA is enabled
Acronis Cyber Protect 15: management server activation fails with "Login failed" while the same credentials are accepted by Acronis Account
Acronis Cyber Protect 15: "Maintenance expired" is shown for Acronis Cyber Protect - Backup Standard or Backup Advanced licenses
Acronis Cyber Protect 15: Cannot assign license to machines with Agent for Windows XP SP2
Acronis Cyber Protect 15 Update 3: Perpetual licenses are not visible in console after Management Server registration
Acronis Cyber Protect: Alert "Protection plan has been revoked from device due to a licensing issue"
Acronis Cyber Protect Cloud: Hyper-V VMs are recognized as physical and can't be protected with Virtual machine quotas
Acronis Business Products: License is not accepted
Acronis Cyber Protect 15: Impossible to run or apply backup plan after update to Build 28405: "The protection plan cannot be applied or updated as the device has no license"
Acronis Cyber Protect: "Storage quota exceeded" alert and how to free up space in cloud storage
Acronis Cyber Protect 15: Virtual Host license assigned to virtual machine in "License usage"
Acronis Cyber Protect 15: "Download the registration file" button does not work in Internet Explorer 11
Acronis Cyber Protect 15: impossible to assign license to virtual hosts in cluster
Acronis Cyber Protect 15: Management Server activation fails with "Registration file is already in use" although the Management Server has never been registered in Cloud
Acronis Cyber Protect 15: Alert "This management server has been offline for X days. Fix the Internet connection issue and ensure that your license is up to date" appears after updating to Build 28035 or later
Acronis Cyber Protect 15: Licenses disappear from on-premise Management Server after re-registration
Acronis Cyber Protect 15: perpetual licenses are not moved to new account in cloud console
Acronis Cyber Protect 15 Update 3: ASign feature is not available in on-premises installation
Acronis Cyber Protect 15: impossible to assign a license for Windows Server Essentials to a machine with Windows Server 2022 Essentials
Acronis Cyber Protect: backups fail with "The following quota is reached: Number of protected Microsoft 365 seats" while the quota is sufficient
Acronis Cyber Protect 15: Impossible to run or apply backup plan to local destination after update to Build 28503: "The protection plan cannot be applied or updated as the device has no license"
Acronis Cyber Protect 15: How to activate Management Server with a large number of licenses
Acronis Cyber Protect 15 Update 3: Virtual host license cannot be assigned to both host and virtual machines
Acronis Cyber Protect 15: "License usage" tab is missing in Cloud console
Acronis Cyber Protect 15: Perpetual licenses disappear from console or AMS activation fails with "Login failed. Make sure that your account exists, and credentials are correct." after update to U3
Acronis Cyber Protect 15: impossible to assign or revoke licenses

Technical Questions & Known Solutions - Agent Registration

Acronis Cyber Protect 15: registering Management Server fails with "Management server blocked" after offline unregistration
Acronis Cyber Protect 15: Offline activation fails with "Registration file is already in use"
Acronis Cyber Protect 15: Management Server activation fails with "An error occurred during registration" if 2FA is enabled
Acronis Cyber Protect, Acronis Cyber Backup: Agent registration fails with "503 service unavailable" if http_proxy environment variable exists
Acronis Cyber Protect: Agent registration fails with "Access denied"
Acronis Cyber Protect 15: "Download the registration file" button does not work in Internet Explorer 11
Acronis Cyber Protect 15: Management Server activation fails with "Registration file is already in use" although the Management Server has never been registered in Cloud
Acronis Cyber Protect Cloud, Acronis Cyber Protect 15: MMS service cannot be started, error "error 0x30002: CannotBind"
Acronis Cyber Protect: How to change default port of mms.exe process (Acronis Managed Machine service)
Acronis Cyber Protect, Acronis Cyber Backup: Registration on Management Server fails if network card is disconnected
Acronis Cyber Protect 15: Getting offline unregistration confirmation file hangs

Technical Questions & Known Solutions - Backup

Acronis Cyber Protect: Backup Fails with "There is not enough space on the volume where the snapshot storage is located"
Acronis Cyber Protect: Application-aware backup fails with "Failed to get the metadata from the 'VMware Snapshot Provider' extension library" or "VSS metadata is missing or corrupt"
Acronis Cyber Protect: SharePoint backup fails with “A backup agent error: endpoint not found”
Acronis Cyber Protect Cloud: backup to EU1 DC fails with “[Archive Server]: storage unavailable”
Acronis Cyber Protect, Acronis Cyber Backup: Backup of a Linux machine fails with "The SnapAPI kernel module is not loaded for the kernel currently running on the system"
Acronis Cyber Protect Cloud, Acronis Cyber Backup: Backup Fails with "All items specified for backup do not exist", "None of the items selected for backup were found", or "The following selected disks are not found"
Troubleshooting Issues with Corrupt Backups
Acronis Cyber Protect Cloud, Acronis Cyber Backup: operation fails with "data is corrupted: CRC mismatch or internal data structures mismatch" or "The archive is corrupted"
Acronis Cyber Protect: Backup fails with "The request could not be performed because of an I/O device error"
Acronis Cyber Protect: Backup to Synology NAS with DSM 7.0-41890 fails with "The credentials for location are not specified"
Acronis Cyber Protect: Backup fails with "Windows error: (0x800705B4) This operation returned because the timeout period expired"
Acronis Cyber Backup: Backup of SQL instance fails with "There are no SQL writers" or "No SQL writers are found in the operating system."
Acronis Cyber Protect, Acronis Cyber Backup: Backup Fails with "Logon failure: unknown user name or bad password"
Acronis Cyber Backup: backup fails with "VSS writer has timed out" or "The backup has failed because 'VSS Writer' has timed out during snapshot creation."
Acronis Cyber Protect Cloud: C2C backups fail with "[Archive Server]: internal error" on AU1 DC
Acronis Cyber Protect: Application-aware backup of a VM ends with a warning "The credentials are incorrect."
Acronis Cyber Protect: Issues when using backup agents newer than 15.0.26321(C21.01 HF1) on OSes related to Windows 7, when the SHA-2 code signing support patch/update from Microsoft is not installed
Acronis Cyber Protect: Backup of Windows machine with LVM disks finishes with warning "Failed to detect OS"
Acronis Cyber Protect: VSS Troubleshooting Guide
Acronis Cyber Protect: macOS backup fails with "Operating system error: Resource deadlock avoided"
Acronis Cyber Protect, Acronis Cyber Backup: Operation fails with "Windows error: (0x8007051F) There are currently no logon servers available to service the logon request"
Acronis Cyber Cloud, Acronis Cyber Protect 15: Backup of ESXi configuration fails with "Failed to connect to ESXi host by using SSH"
Acronis Cyber Protect 15: Backups of Microsoft 365 resources fail with "Quota is reached" since October 2021
Acronis Cyber Protect 15: Protection plans are missing after upgrade from Acronis Cyber Backup 12.5, newly created plans cannot be started
Acronis Cyber Protect: backup fails with "Network disconnected", "The network path was not found" or "Cannot connect to the machine where network share is located"
Acronis Cyber Protect: Application-aware backup of machine with Exchange fails with "Windows error: (0x80131501) Exception has been thrown by the target of an invocation"
Acronis Cyber Protect: Hyper-V virtual machine backup produces warning "Changed Block Tracking (CBT) is not used because there are disk files that do not belong to any disk snapshot."
Acronis Cyber Protect 15, Cyber Backup 12.5: Backup to tape fails with "The storage media is write protected" if tape is LTFS-formatted
Acronis Cyber Protect 15: error "At least two drives must be specified in multistreaming options" when editing or creating a protection plan after upgrade
Acronis Cyber Protect: Application-aware backup of Hyper-V VM fails with "Internal error: Unsuccessful response code '7' of action request"
Acronis Cyber Backup 12.5, Acronis Cyber Protect 15, Acronis Cyber Protect Cloud: Backup hangs if Kaspersky endpoint security is enabled on agent machine
Acronis Cyber Protect: Troubleshooting Hyper-V snapshot issues
Acronis Cyber Protect 15: Backup fails with "Connection to the storage node failed"
Acronis Cyber Protect: backup via file policy rules fails on macOS
Acronis Cyber Protect: C2C backup fails with "Credentials object not found"
Acronis Cyber Protect, Acronis Cyber Backup: "The activity has failed due to a restart of the service" or "The activity has failed due to an unexpected machine reboot or the backup process was terminated." error
Acronis Cyber Protect, Acronis Cyber Backup: Operation fails with "Windows error: (0x80070299) The requested operation could not be completed due to a file system limitation" or "Cannot write data to file <path> due to a file system limitation"
Acronis Cyber Backup: Troubleshooting vSphere Snapshot Issues
Acronis Cyber Protect: Single-Pass Backup of MS SharePoint Server Fails with "Database is already open and can only have one user at a time"
Acronis Cyber Protect Cloud, Acronis Cyber Backup: Backup fails with "A device attached to the system is not functioning"
Acronis Cyber Protect Cloud, Acronis Cyber Backup: Backup fails with "Unknown status"
Acronis Cyber Protect: backup to Acronis Cloud storage fails with "Network connection failed due to timeout."
Acronis Cyber Protect: OneDrive backup failed with "Microsoft OneDrive is not available" and "Error authenticating with resource"
Acronis Cyber Backup: Operation fails with "Failed to lock the file"
Acronis Cyber Protect: Snapapi fails to build on CloudLinux 7 with a hybrid kernel
Acronis Cyber Protect: Hyper-V VM backup fails with "Unexpected call result. Error code 32768"
Acronis Cyber Protect: Backup fails with "Failed to create snapshot" on RHEL 8.4, CentOS 8.4 and AlmaLinux 8.4
Acronis Cyber Protect Cloud, Acronis Cyber Backup: Backup fails with "Insufficient system resources exist to complete the requested service"
Acronis Cyber Protect: Mailbox backup or recovery fails with "Failed to connect to Microsoft Exchange API using url '{0}'"
Acronis Cyber Protect: operation fails with "The activity has failed due to a planned restart of the operating system"

Technical Questions & Known Solutions - Restore

Acronis Cyber Protect: Restore fails with "The system cannot find the path specified" if path contains more than 260 symbols
Acronis Backup Software: BSoD after Restore to New Hardware with "Stop 0x0000007B" Due to Missing Drivers
Acronis Cyber Protect: recovered machine fails to boot with BSOD c00002e2
Acronis Cyber Protect, Acronis Cyber Backup: Operation fails with "Windows error: (0x8007051F) There are currently no logon servers available to service the logon request"
Acronis Cyber Protect, Acronis Cyber Backup: Recovery to Gen2 Azure VM stuck on 15%
Acronis Cyber Protect, Acronis Backup for Linux: LVM Structure Cannot Be Partially Restored during Automatic Mapping
Acronis Cyber Protect: Mailbox backup or recovery fails with "Failed to connect to Microsoft Exchange API using url '{0}'"
Acronis Cyber Protect 15 Update 3: ASign feature is not available in on-premises installation
Acronis Cyber Protect, Acronis Cyber Backup: How to Restore Files and Folders from Cloud (Web Restore)
Acronis Cyber Protect: backup or recovery of mailboxes fails with "The account does not have permission to impersonate the requested user"
Acronis Cyber Backup, Acronis Cyber Protect: Activity fails with "Windows error: (0x800704C8) The requested operation cannot be performed on a file with a user-mapped section open"
Acronis Cyber Backup: Recovery of an Exchange database fails with "It is not allowed to overwrite database during recovery"
Acronis Cyber Protect: "Activity 'Refreshing recovery points' failed. The credentials for location are not specified."
Acronis Cyber Protect Cloud, Acronis Cyber Backup: Impossible to recover files to the original VM in case of agentless backup
Acronis Cyber Protect 15: boot order of a recovered VMware VM cannot be modified
Acronis Cyber Backup: Recovery to a new Hyper-V virtual machine fails with "Cannot recover the volume from the disk backup. There is insufficient free space on the target disk"
Acronis Cyber Protect 15, Acronis Cyber Protect Cloud: "External IDs conflict for >1 credentials objects" when specifying credentials for a shared folder
Acronis Cyber Protect, Acronis Cyber Backup: Original location unavailable during file-level recovery on Linux from a volume with a label

Technical Questions & Known Solutions - Bootable Media

Acronis Bootable Media Does Not Detect HDD, RAID or NIC
Acronis Cyber Protect, Acronis Cyber Backup: Disk management is missing in WinPE media
Acronis Bootable Media does not detect HP Smart Array B110i, B120i, B140i, B320i, S110i
Acronis Cyber Protect 15, Acronis Cyber Backup 12.5: Bootable media builder doesn't accept WinPE files by media creation: "The selected folder does not contain the required WinPE files"
Acronis Cyber Protect, Acronis Cyber Backup: macOS backup is not available under bootable media
Acronis Cyber Protect Cloud, Acronis Cyber Protect: Linux-based bootable media does not support PERC RAID controllers

Technical Questions & Known Solutions - Antimalware Protection

Acronis Cyber Protect: How to report False Positive and False Negative cases
Acronis Cyber Protect: URL filtering does not block website from the blocklist on Google Chrome
Acronis Cyber Protect: Threat feed details are not loading

Technical Questions & Known Solutions - Other Issues

Acronis Software: Troubleshooting application lockups
Acronis Cyber Protect, Acronis Cyber Backup: "An activity with ID = '...' cannot be found" error
Acronis Cyber Protect 15, Acronis Cyber Backup 12.5: Troubleshooting login to web console issues
Using OpenSSL to troubleshoot connection issues caused by firewalls and DPI software
Acronis Cyber Protect: troubleshooting performance issues in Microsoft Office software when Agent is installed
Acronis Cyber Protect, Acronis Cyber Backup: how to delete incomplete backups from Cloud Storage
Acronis Cyber Protect 15: management server activation fails with "Login failed" while the same credentials are accepted by Acronis Account
Acronis Software: Troubleshooting Application Crashes
Acronis Cyber Protect: how to fix corrupted archives in network locations
Acronis Cyber Protect 15: Multiple 'Cyber Protection (or Active Protection) service is not responding' alerts after reboot
Acronis Cyber Protect, Acronis Cyber Backup: Operation fails with "Windows error: (0x8007051F) There are currently no logon servers available to service the logon request"
Acronis Cyber Protect: deleted archive is shown in backup location and attempt to delete it fails with "Cannot find archive 'ID'
Acronis Cyber Protect: file_protector.sys or file_tracker.sys consumes a lot of RAM
Acronis Cyber Protect: Activity fails with "An internal error. Please contact the support team"
Acronis Cyber Protect 15, Acronis Cyber Backup 12.5: additional tape is required for retention rules to work if one backup per tape is used
Acronis Cyber Protect 15: error "At least two drives must be specified in multistreaming options" when editing or creating a protection plan after upgrade
Acronis Cyber Protect: applying protection plan fails with "Protection plan conflict detected"
Acronis Cyber Protect: Alert "Protection plan has been revoked from device due to a licensing issue"
Acronis Cyber Backup: Activity fails with "The process cannot access the file because it is being used by another process" and "Failed to lock the file because it is opened in another program"
Acronis Cyber Protect: Acronis services are not running or connection to Acronis Agent fails with "Failed to establish local connection"
Acronis Cyber Protect: non-existing backup plans are still running on workloads after C22.04 release
Acronis Cyber Cloud, Acronis Cyber Backup: incorrect cloud storage usage
Acronis Cyber Protect Cloud: After selecting the location "Temporary registration: do not enable for any tenants", Disaster Recovery and other services are not available.
Spotting and fixing hardware I/O errors (disk errors) on Linux
Acronis Cyber Protect: Troubleshooting hardware resources overuse (high CPU, memory usage) and performance issues
Acronis Cyber Protect, Acronis Cyber Backup: all or some VMware virtual machines do not appear in the console
Acronis Cyber Protect 15: Management Server activation fails with "Registration file is already in use" although the Management Server has never been registered in Cloud
Acronis Cyber Protect, Acronis Cyber Backup: Installation of third-party Antivirus fails if Acronis Agent is installed
Acronis Cyber Protect: Error "The following quota is reached" when using Cloud Deployment
Acronis Cyber Protect 15: Off-host data processing plans fail with timeout error if several backups/locations are selected
Acronis Cyber Protect: "Scheduler failed to run task with GUID 'X' because of error 2" errors in Windows Event Log
Acronis Cyber Backup, Acronis Cyber Protect: Activity fails with "Windows error: (0x800704C8) The requested operation cannot be performed on a file with a user-mapped section open"
Acronis software: How to troubleshoot EWS connection by using EWSEditor
Acronis Cyber Backup, Acronis Cyber Protect: tape erase operation fails with "The parameter is incorrect" error
Acronis Cyber Protect Cloud: Unable to install LogMeIn / Bitdefender AV after Agent update to 12.5.22210 and higher
Acronis Cyber Backup: P2V and V2P migration of machines with LVM
Acronis Cyber Protect: Cyber Protection Monitor shows "Protection plan not applied" status when protection plan without backup is applied to device
Acronis Cyber Protect: VM backup or running VM from backup fails with "The specified module could not be found" if Microsoft Visual C++ 2017 Redistributable is not installed with VMware VDDK 7.0
Acronis Cyber Protect: Attempt to remove backup or recover files fails with "The machine is offline or is not available"
Acronis Cyber Backup, Acronis Cyber Protect: tape size is smaller than the declared tape capacity
Acronis Cyber Protect 15: Slow loading of recovery points under Devices - Recovery
Acronis Cyber Protect 15: saving protection plan fails with "HTTP request failure for URL "/api/credentials_store/v2/credentials" if non-English SQL server is used
Acronis Cyber Protect: Word.exe does not start on the agent machine after cyber definitions update
Acronis Cyber Protect: Many "Running smart recommended actions" activities in pending or failed state
Acronis Cyber Protect 15: Getting offline unregistration confirmation file hangs
Acronis Cyber Protect, Acronis Cyber Backup: SnapAPI issues on Linux with kernel 5.8
Acronis Cyber Protect Cloud: Incorrect protected devices count in Account management console after C21.01 release
Acronis Cyber Protect: C2C backup archive size is larger than expected
Acronis Cyber Protect 15, Acronis Cyber Backup 12.5: Cleanup by number of backups results in one extra backup
Acronis Cyber Protect: C2C activity fails with "A backup agent error: 'nothing is processed in protection applying'"

Troubleshooting

Acronis Cyber Protect, Acronis Cyber Backup: Cleanup Utility
Acronis Cyber Backup 12.5 and Acronis Cyber Protect 15: how to collect system information
Acronis Cyber Protect Cloud, Acronis Cyber Protect 15 and Acronis Cyber Backup 12.5: Connection Verification Tool
Acronis Cyber Cloud: access ports and hostnames
Linux System Report
Acronis Cyber Protect: troubleshooting performance issues in Microsoft Office software when Agent is installed
Acronis Cyber Protect 15, Acronis Cyber Backup 12.5: how to manually add a machine to management server
Acronis Cyber Protect 15: management server activation fails with "Login failed" while the same credentials are accepted by Acronis Account
Acronis Cyber Protect, Acronis Cyber Backup: Operation fails with "Windows error: (0x8007051F) There are currently no logon servers available to service the logon request"
Acronis Cyber Protect: VSS writer has failed to process the snapshot
Acronis cloud certificate location
Acronis Cyber Protect 15: Windows services and processes
Acronis Cyber Protect: Snapapi fails to build on CloudLinux 7 with a hybrid kernel
Acronis Cyber Protect, Acronis Cyber Backup: Changing Temp Files and Folder Location
Acronis Cyber Protect: Backup of VMware ESXi VMs fails with "Failed to authenticate with the guest operating system using the supplied credentials"
Acronis Cyber Protect: Troubleshooting failing "Updating Cyber Protect definitions" activities
Tape Detection Tools
Acronis Cyber Protect Cloud, Acronis Cyber Protect: Collecting VMware VDDK Logs
Acronis Cyber Protect 15, Acronis Cyber Protect Cloud: Activity fails with "DNS hostname resolution error"
Acronis Cyber Backup: Enabling debug logs for scheduler on Virtual Appliance