I am hoping to get a better understanding of what is in the database, or what is taking up the space. Basically, we have several databases with a lot of white space and are running out of disk space. To solve this, I migrated all of the mailboxes from the first database, dismounted it, and defragged it using eseutil. After the defrag process completed, the database, which as far as I know is empty, is still 80+ GB. It now shows only a couple hundred MB of white space, so what in the world is taking up 80+ GB? Is there a way I can determine what is in the database? I've run Get-Mailbox -Database <DbName> and nothing is returned. I've also run Get-MailboxDatabase <DbName> | Get-Mailbox, which returns nothing. I've also used the -Archive switch to return archive mailboxes and nothing shows up. I'm tempted to just delete the database and create a new one, but I have no idea what is taking up the 80+ GB, so I don't want to delete data without knowing what it is.
This is on an Exchange 2013 CU 10 mailbox server running on Server 2008 R2 Enterprise.