We have an Exchange 2003 on an SBS 2003 box. The database is almost full (74GB). There used to be a journaling mailbox that took up half of that space. We have long deleted and purged that mailbox, so the actual sum of all the mailbox sizes that show up under mailboxes in the ESM is about 38GB. However, the online defrag does not show a lot of whitespace (40MB) and a previous offline defrag did not result in significant size savings.
The question is:
1. Is the online defrag result a good indicator of what the offline defrag will reduce the files by?
2. What do we do? Our Exchange is about to stop mounting...