Issue

Backup Exec 2010 R3 was failing to perform a single item (GRT) restore to an Exchange 2007 server from either disk or tape (Client is using B2D2T). Both the Backup Exec Media server and Exchange 2007 server were running Windows Server 2008 R2.

The error being displayed was:

Error : e000848c – Unable to attach to a resource. Make sure that all selected resources exist and are online, and then try again. If the server or resource no longer exists, remove it from the selection list. Edit the selection list properties, click the View Selection D

Solution

I checked all the usual suspects and all account permissions, services (Exchange System Attendant) etc were set and running OK.

In the end, I had to modify the hosts file on the Exchange 2007 server with the following:

127.0.0.1                   hostname of the Exchange server
127.0.0.1                   FQDN of the Exchange server
actual IPv4 address    hostname of the Exchange server
actual IPv4 address    FQDN of the Exchange server

Once done, I restarted the Backup Exec Remote Agent for Windows Systems service on the Exchange server.

Official Symantec article: http://www.symantec.com/docs/TECH75728