what is their free/busy setting? Are they publishing? did you try opening
outlook with the cleanfreebusy switch?

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Diane Poremsky [MVP - Outlook]
Author, Teach Yourself Outlook 2003 in 24 Hours
Coauthor, OneNote 2003 for Windows (Visual QuickStart Guide)
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>I have several users whose schedules recently started to appear completely
>open to someone scheduling a meeting/appointment when their out of office
>is turned on. Any ideas? We're using Outlook 2003 and Exchange 5.5.