We have a situation where a group of users who utilize a shared mailbox are getting a weird issue from time to time. They will take mail from their own mailbox and drag it to the shared mailbox. Sometimes the email show up fine, other times the from field shows the GUID of the person's mailbox rather than their email address after they move it. See attached pictures. Any idea what would cause this and how I would fix it? It appears this way in everyone's Outlook and OWA.
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