VSS writer failures may occur when Backing up Exchange 2003, 2007 and 2010 as running 'VSSADMIN LIST WRITERS' shows no available Microsoft Exchange VSS writer.
E000FED1 - A failure occurred querying the Writer status.
To enable to Microsoft Exchange VSS writer:
DWORD: Disable Exchange Writer
If its there and set to 1, set it to 0 and restart the Exchange Information Store Service. [Please note, when you restart this service, users will be disconnected from Exchange].
Note: If the registry key is not there, create the value and set it to 0.