I've never attempted to restore a deleted individual mailbox and figure it's a good thing to have tried for when/if it's actually needed. I have a full backup from Monday (today is Wednesday), i have the GRT options checked in the backup for Exchange, I can browse through the backup job and find a particular employee's mailbox that I removed on Tuesday. My question is, is it as simple as selecting that checkbox and submitting the job? His account no longer exists on the network because he is no longer employed with us, i figured it was a good person to try this on. I see an option in Backup Exec that says "automatically recreate user accounts and mailboxes", so i assume i would select that as well. I guess it just seems too easy, and since this is a production server i wanted to ask around before attempting to restore this individual mailbox back. Anyone have any experience with this? Thanks.
Yes, that's all you need to do. If you're restoring the mailbox for a user account that's been deleted and you want to restore the mailbox and the user account then you need the option to automatically recreate user accounts and mailboxes selected. You do not need to restore the mailbox to an intermediate mailbox store or mailbox.
As for the option to mount the database after restore, this is only valid for a restore of the Information Store itself and has no bearing on the restore of an individual mailbox, mailbox item, public folder, or public folder item.
You can choose to redirect the restore of the mailbox to an alternate user/mailbox but the alternate user/mailbox must already exist and you must unselect the option to automatically recreate user accounts and mailboxes. The restore will effectively overwrite the destination mailbox so only do this with an empty destination mailbox for the purpose of exporting the contents of the mailbox (for when you don't want to recreate the user account and only want to retrieve the contents of the mailbox).
Take note that like any user account restore, the user account group membership is not restored and must be edited manually after the restore is complete.