Out of office Assistant Not Working

We have recently done an exchange 2007 to 2010 migration and since this has occurred we are getting very random people on the estate complaining that when they try to turn on the out of office they get the following error message. "Your out of office settings cannot be displayed, because the server is currently 8unavailable".

I have attached a screen shot of the message as well.

Kind regards

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crystal (strive4peace) - Microsoft MVP, AccessRemote Training and ProgrammingCommented:
here is a link you may find helpful:

MASEE Solution Guide - Technical Dept HeadCommented:

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HKFueyAuthor Commented:
Hi Mas thanks for the help. I didn't have to change the registry just the proxy exceptions (they were pointing at the old server!!)
MASEE Solution Guide - Technical Dept HeadCommented:
Glad to know your issue is resolved.
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