We have numerous Exchange Mailbox Archives that the AD account and Exchange mailbox were removed.
I would like to remove those archives, if all items have reached the retention period.
I don't have the abiltity to determine what retention policy was applied on the accounts, since the AD account is removed and no longer part of the groups used to apply policy.
Is there a query that I can run to determine the number of items in the archive and the retention policy applied?
To avoid this issue in the future, when a user is leaves the company what is the best practice on account and mailbox removal when an archive is attached?