Has anyone encounter issue trying open or view email header in MS Defender under mail explorer? This only happens on messages that are in users mailbox. I get a n error that says "Message details not found. When a message is soft deleted or hard deleted by the user or the admin, its details no longer exist in the mailbox or server". I don't get this on messages that been flag with alert only on normal messages that are in users mailbox and the message is still in my mailbox.