We have an Exchange 2010 with about 70 mailboxes running on Win 2008 R2 server. Although the sum up of all the mailboxes is only about 80G we found out the .edb file is currently about 172G, which is more than double in size. This is the second time in the last two months we found this issue. Last time we moved all mailboxes out to another edb file and delete the old edb.
Obviously there must be a root cause which was not resolved by moving out mailboxes and deleting edb. Can you tell us what could be wrong? How to fix it?