Exchange 2010 SP3 UR7 env.
I have it set at the DB level to retain disabled mailboxes for 15 days. My boss wants to change it to 90 days. We have about 15K users spread out across 15 DBs at 1TB per DB.
I have one of those Exchange Env. Reports that you can download running daily that shows the total users per database, when last backed up, etc. The problem is that I don't think that report (or exchange for that matter) lists disabled mailboxes in the total mailbox count. Correct me if I'm wrong on that.
So my problem is that we have anywhere from 1 to 20 people leaving per day, along with about the same amount of new hires per day. What happens when I raise the retention from 15 days to 90 days I'm going to have a ton more DB space being used for old mailboxes. I don't see this anywhere on the exchange calculator either.
Suggestions or MS Documentation would be helpful.