If an Outlook for Mac database won’t rebuild, is there a way to salvage any of the information in the identity?

We have a user whose main identity database is corrupt, and the database utility just hangs with no progress, even left running overnight.

The disc itself checked out clean, but it appears the identity is beyond repair.

Is there any way to salvage some of the mail stored locally  in that identity?

We use Exchange, but have pretty strict size limits, resulting in most folks saving mail locally.

There was a recent Time Machine backup (though I'm not sure if that database is corrupt), but we're getting a "you don't have access" error when I try to restore it, so I can't test it.

Thanks in advance for your advice!