Virtual machine on hyperv 2012r2 backup problem

Hi there.

We have Hyper-V on 2012 r2 HOST.

Virtual machine is also on 2012 r2 OS with Exchange EDGE 2013 role.
When we wish to make backup with VEEAM BACKUP AND REPLICATION (version 8 + update 3) we recieve an error.

3/19/2016 12:08:13 PM :: Unable to create snapshot (Microsoft Software Shadow Copy provider 1.0) (mode: Hyper-V child partition snapshot). Details: Writer ‘Microsoft Hyper-V VSS Writer’ is failed at ‘VSS_WS_FAILED_AT_PREPARE_SNAPSHOT’.
The writer experienced a transient error.  If the backup process is retried,
the error may not reoccur.
-tr:Failed to verify writers state.
-tr:Failed to perform pre-backup tasks.

3/19/2016 12:08:34 PM :: Make sure VM does not have ‘iSCSI Software Target Storage Provider’ feature installed.

3/19/2016 12:08:34 PM :: Retrying snapshot creation attempt (Writer ‘Microsoft Hyper-V VSS Writer’ is failed at ‘VSS_WS_FAILED_AT_PREPARE_SNAPSHOT’.
The writer experienced a transient error.  If the backup process is retried,
the error may not reoccur.
-tr:Failed to verify writers state.
-tr:Failed to perform pre-backup tasks.)

Any hints how to solve this guys?

With best regards


bostjanc

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