Outlook E-mails Disappearing

I have a user who works remotely, and is having this problem: When moving messages from Junk Mail to Inbox, the message disappears. I have checked and there are no Outlook rules setup on this persons account, and have searched the mail account for the “missing” messages to verify they are not being deleted or moved to another folder. Because this person is remote, I have not been able to re-create the mail profile on the machine or re-install Outlook. Does anyone have any suggestions on this? Also, is there a way to create a message that Outlook will see as “Junk” so that way I can test this and verify this is the case? Any input would be greatly appreciated. Thank you!