I have hit an issue on a MS SBS machine where every morning the datastore for the exchange mailboxes dismounts itself.

We believe the issue is that it has grown too large over time and needs cut down a bit.

As part of this we have removed (purged) some mail files that were no longer needed, which should have given us a saving of roughly 3GB (more than enough saving for what we need).

So I deleted the mailboxes, then purged them and noticed that the .edb file was still reporting the same size, I dismounted and remounted it to see if that would have any effect but it did not.

Am I missing a step? I have read online that you can run offline defrag on the file but that seems to only save you a small amount of whitespace.

Any help would be greatly appreciated.