Read Mail disappears from Inbox

Strange: When one of our Users reads a new received Mail and then closes it, this Mail disappears from the Inbox and can´t be found anywhere in his Mail File. The Mail file resides on the Server and there is no local Replica on his Workstation. But this happens only when he opens the Mail file from his own PC, when the Mail file is opened from any other Workstation all Mails in the Inbox are present. Any Ideas?

Michael

Subject: Read Mail disappears from Inbox

Check the last option in the action bar of Inbox, perhaps hidden if your screen is 800*600.

This new option allow user to show only unread mails.

HTH

Guy

Subject: RE: Read Mail disappears from Inbox

Never see that option. What is it called?