This may seem obvious to everyone else out there, but it wasn’t to me. I am testing a new Exchange 2010 server running in VMWare and am experimenting with backups. I have the whole server backed up using BE AVVI, but wanted the granular restore of mailboxes and messages, so I was also running a job where I selected just the Exchange database. When I went in to do a test restore the Microsoft Information Store showed up in the list with two distinct entries. The properties looked slightly different but the data was the same.
It took me a little time to realize that I was duplicating my Exchange data by having those two backups (duh!), so I turned off my specific Exchange job and just left it with the AVVI job only. What I didn’t realize was that just having the AVVI job would allow me the granular restores of messages from Exchange.