When creating a master image using Linux bootable media, the size of created image is bigger than expected - the image is created in sector-by-sector mode. This issue occurs only, when using Windows Drive Management tool to resize partitions before.
Make sure you have Acronis Snap Deploy Management Agent installed on the remote machine whose master image you are going to take. See Acronis Snap Deploy 5: Remote Installation;
Start Acronis Snap Deploy Management Console and connect to the machine with the Acronis Snap Deploy Management Agent: