59847: Acronis Backup 12.5: backup fails with "Cannot check the license due to a connection issue with the management server"

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Symptoms

Backup fails with:
Error code: 22
Module: 309
LineInfo: 0x8D165E86FB81959B
Fields: {"$module":"agent_protection_addon_vsa64_7002","CommandID":"D332948D-A7A9-4E07-B76C-253DCF6E17FB"}
Message: TOL: Failed to execute the command. Backup plan 'AAVB'
------------------------
Error code: 102
Module: 664
LineInfo: 0xBFC205B2F53C24E8
Fields: {"$module":"agent_protection_addon_vsa64_7002","FeatureID":"exchangeBackup"}
Message: Cannot check the license due to a connection issue with the management server.

Cause

Acronis Management Server host name cannot be resolved to IP from the machine where the agent is installed.

Solution

Update the product to the latest build (see https://kb.acronis.com/content/59131).  

If the issue still persists after upgrade, the error indicates a network issue. Check your network and make sure that Acronis Management Server is accessible from the agent machine. 

If there is are network issues and Acronis Management Server is accessible from the agent machine, collect system information from the affected agent machine and from Acronis Management Server and contact Acronis Customer Central.

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