dear all i want to delete mailbox that contains 150 GB of data, but i want to be sure that after deletion, the preserved size eill be free so i can free up 150 Gb Thanks Ashraf Khalifah

When you will delete the mailbox it will free space in edb file (after online maintance completes), which can be used by new items. But It will not resize edb file. To shrind edb file you need to unmount database and use eseutil. So first in Management Console delete the mailbox than use below command in Exchange management shell Remove-Mailbox -Database "Mailbox Database" -StoreMailboxIdentity -confirm:$false If you do not want to kkep AD account ommit -StoreMailboxIdentity With kind regards Krystian Zieja http://www.projectnenvision.com Follow me on twitter My Blog