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Outlook 2003 no Free/Busy for resource mailboxes on Exchange 2010

Hi,
We have an Exchange 2010 native deployment, which was upgraded from Exchange 2003.

The problem is that Outlook 2003 users cannot see the resource (room mailbox) free/busy. (No free/busy information could be retrieved)
Outlook 2003 can see other users F/B.
Outlook 2007 / 2010 / OWA can see the resource F/B.

I have had a look around and can only think that the MS exchange system attendant is not pushing calendar updates into the F/B public folder just for the resource mailboxes.

thanks

Leighton

Determine if autodiscover is on and available:

http://technet.microsoft.com/en-us/library/bb201695.aspx

Testing:

http://technet.microsoft.com/en-us/library/bb123573.aspx

Apply this hotfix
http://support.microsoft.com/kb/979690

Read more here
http://blogs.technet.com/b/exchange/archive/2010/04/23/3409853.aspx

ASKER

thanks amitkulshresha, that hotfix is for Exchange 2003. All the servers are exchange 2010.

ASKER

Autodiscover is on. Test-OutlookWebServices returns 100% success.

My bad, let me give you the outlook one

As a test, is the data available if you re-create an outlook profile?

ASKER

No, if the outlook profile is re-created the problem remains.

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ASKER

Because it works.