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Discrepancy with shared mailbox when removing user-mailbox
Hello, When we remove a mailbox from Exchange 365, we see a discrepancy with the shared mailboxes the user had access/permissions for. - the user-object is deleted for "Full-Access" - the user-o...
This is expected behavior — Full Access is mailbox-level and gets cleaned up automatically, but Send As is an Active Directory permission and isn’t removed when the user is deleted. You’ll need to manually clean up the orphaned Send As entries from the shared mailboxes.
Even when there are more users with Full Access permissions, the problem occurs. Ownership is not a problem. It is that the SendAs permission is not removed correctly.