During a backup of Microsoft Exchange 2007 or 2010 the job may fail with the error "VFF Open Failure. This can be caused by low memory or disk resources."
Unable to complete the operation for the selected resource using the specified options for the following reason: VFF Open Failure. This can be caused by low memory or disk resources.
Backup of a Microsoft Exchange 2007 / 2010 Information store may fail with the above error message during full or incremental backups of the database to a backup to disk or tape device.
Error from the debug logs:
VFF Process ModuleName 8: C:\Program Files\Symantec\Backup Exec\RAWS\beremote.exe
Starting Persistent Virt VFF id (6912-00001B00) 126.96.36.199
CheckVirtOpen:Unable to see I/O in GRT directory :C:\TEMP\Backup Exec\IMG##\VDB FOLDER
The most likely cause of this problem is that the path is on a DFS share. Suggest using a local drive or non-DFS share.
Virt Session aborted prematurely (7)
Error on Virt thread start up (1B00) (0)
Error Aborting OpenVirt
EndDriverSessionThread:SetEvent failed, lastError = 00000006, The handle is invalid.
Closing Persistent Virt VFF id (6912-00001B00) with: Total Bytes Read=00000000:00000000, Written=00000000:00000000
OpenVirt FAILED, but didn't say why!
Using EDB Provider for Browse/Backup.
Logon: m_lpMAPISession->Logon returned 80004005
FILTER DRIVER OPEN SESSION FAILED: Unspecified error