SBS 2008 backup failing to create snapshot
vSphere 5, ESXi host fully remediated. I am currently backing up three VMs, two are working fine one is not.
The failing one is SBS2008, both non-Exchange and Exchange aware backups fail. The snapshot fails with a VMware "fault.ApplicationQuiesceFault.summary". The detail show that "The guest OS has reported an error during quiescing. The error code was: 5 The error message was: 'VssSyncStart' operation failed: Unspecified error (0x80004005)".
I can create a quiesced snapshot from vSphere client without a problem. Only VSS provider listed is the Microsoft one, all VSS writers are reporting no errors. I can enable/disable volume shadow copies on all drives in the OS without errors.
I've been investigating this one for a while now and am running out of ideas. I have observed that after the failed attempt to create the snapshot the sbs-000001 and sbs_1-000001 disks are present, which requires a snapshot consolidation to sort out.
I did have this working at one stage, but had to discontinue vmProtect backups and implement SBS Backups for a while due to other issues. I have been unable to get the vmProtect backup to work at all since stopping the SBS Backups.
Exchange 2007 is only at SP1, but I doubt this is the issue as it was working before and non-Exchange backups are failing as well as Exchange aware.
Grateful for any suggestions on how to resolve from here.