XCLN: Deliver New Mail Moves All Messages (Old and New)

SUMMARY

Microsoft Exchange users have the option for new messages to be delivered to either their Mailbox (on the server) or their Personal Folders (into the user's PST).

To toggle this setting, a user would select Tools, Options, Delivery, and toggle the "Deliver new mail to the following location" between "Mailbox" and "Personal Folders".

When there are existing messages in the Mailbox and the user changes the "Deliver new mail to the following location" to "Personal Folders", all messages, both read and unread, are individually moved to the Personal Folder Inbox. This is different than expected, since existing mail is moved as well as new mail.