Entourage causes Outlook calendar to disappear

I have a User viewing his outlook calendar via Entourage 2008 on his Mac.

we've had problems with appointments disappearing & doubling in the past, but this week his calendar has entirely disappeared now 3 times.

On the Windows side his Admin Assistant is using Outlook xp off our Exchange 2003 server.

Timing wise... (at least the 3rd time) it seemed like when he opened Entourage, the calendar disappeared soon after.

In the Event Viewer of the Exchange server we get numerous 8207 and 8230 event IDs.

Any help would be appreciated.  There are so many Mac/Outlook Calendar posts out there... it's hard to locate a specific resolution to this.

thanks
mjh
mjh33Asked:
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strungCommented:
I don't have an answer, but if you haven't already found this site, I would look here first:  http://www.entourage.mvps.org/
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g000seCommented:
Hello,

Is his calendar synchrozing to other devices?

Also, can you view his calendar using OWA?
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mjh33Author Commented:
His calendar does appear fine still on his iphone - but it's gone from Entourage and Outlook/Exchange

I haven't checked our Exchange OWA... but I'd imagine it's not there.  I'm restoring it yet again now.
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mjh33Author Commented:
what I ended up doing for this...

i removed his outlook calendar completely... then about an hour later had him clear his cache in his Entourage calendar.  I waited the hour because his iPhone was still showing appointments.

It's been over a week now... we still some duplication here and there... but no appointments have disappeared.  I'll probably go through this cycle periodically.  His calendar is packed normally.
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