Error: Failed to check whether snapshot is in progress (network mode) in Veeam backup

Error

Processing <Server_Name> Error: Failed to check whether snapshot is in progress (network mode).
RPC function call failed. Function name: [IsSnapshotInProgress]. Target machine: [Server_Name.pad.loc].
RPC error:The RPC server is unavailable. Code: 1722 in Windows server 2016 and above environment.


Root cause of this issue is,

Look likes firewall has issue, and it turns out it was.

Solution

Enable the rule Remote Service Management [RPC-EPMAP]. This will allow the job to continue. This rule is disabled by default in Windows server 2016, but previous version this rule might enabled by default..