Dear All, My exchange version is 2007 , it seems have problem that haven't auto reduce the edb size. Why I find this problem that I have archive some mail to local howerver I find the database size haven't reduce. I use the powershell script to show all the mail box size and that is less than 20GB compare with current database size. Thanks, Ricky

Dear, Is it mean the databse will only group not auto reduce, It seems will mounte and dismounte more time when start the inforamtion store service. Thanks, Ricky

Hi If you want to avoid offline, you can create new database and move mailbox to new database. Then you can remove origin database. I know it is not good way.Terence Yu TechNet Community Support