If you are running Exchange Server 2007 and Outlook 2007/OWA 2007, you may experience and issue where free/busy information cannot be seen for objects synchronized by QCS.
Free/busy information is visible however for other users native to your forest that are also using Outlook 2007.
This may occur is the Availability Service in Exchange 2007 is not configured correctly. The following is from the QCS 2.0.3 Release Notes, under "New in This Release":
Full Exchange 2007 support for Free/Busy synchronization. Note that Public Folders are required for free/busy synchronization. If you are using Outlook 2007 or OWA 2007, you also need to configure Exchange Availability Service to retrieve free/busy for the corresponding namespaces from public folders.
In Exchange 2003/Outlook2003 and below, Free/busy information is stored in a public folder called "Schedule+ Free Busy". This is also where QCS places free/busy information when synchronizing.
However, when using Exchange 2007 and Outlook 2007, free/busy information is now stored in the user's mailbox by default. Outlook uses the Exchange Availability Service to determine where to find free/busy information for a particular user. If this service is not configured correctly, Outlook will not look in the public folders for free/busy, and so will not see the free/busy synchronized by QCS.
To resolve the problem, the Exchange Availability Service must be configured to tell Outlook to look in public folders for all QCS stub objects. To do so, please use the following Exchange PowerShell command:
Add-AvailabilityAddressSpace -ForestName:namespace -AccessMethod:PublicFolder
Where "namespace" is the namespace of the QCS stub objects - for example, sourcedomain.com
Add-AvailabilityAddressSpace -ForestName:sourcedomain.com -AccessMethod:PublicFolder
To display the current AddressSpace please use the following Exchange PowerShell command:
Get-AvailabilityAddressSpace
To remove an incorrectly entered address please use the following Exchange PowerShell command:
Remove-AvailabilityAddressSpace -Identity namespace
Where "namespace" is the namespace of the address to remove - for example, sourcedomain.com
Remove-AvailabilityAddressSpace -Identity sourcedomain.com
For additional assistance or questions regarding the Exchange Availability Service, please contact Microsoft.
