What are the best practices when de-provisioning mailboxes
When planning on removing mailboxes form source accounts post migration, it is critical that the account be moved outside the DSA Sychronization scope prior to removing the exchange attributes. If this does not occur, then some attributes may get synchronized to the target.
Not all exchange attributes are sychronised, however they must be visible for the target to mailbox enable.
The Attributes removed when removing exchange attributes are:
