If you can’t, there is one more thing you can check.
If you migrated users from an Exchange 2003 server, chances might be good that you did not migrate over the Free/Busy public folder information correctly.
The Free/Busy information is posted as a single message that contains data for the entire Free/Busy duration.
Look at the Scheduling assistant to see if you can see free/busy information.
If you install Windows Management Framework 3.0 on a server running Exchange 2007 or Exchange 2010, you will encounter problems, such as Rollups that will not install, or the Exchange Management Shell may not run properly.” When running some SBS wizards like the Fix My Network wizard it will end up with errors about access denied for the Exchange Management Shell.
Also other kind of problems may occur with the Exchange and / or Share Point 2010 Management Shell and as written for Exchange Servers installation of Exchange update rollups may fail.
Although Tech Net and the Exchange development team blog (at provide good information about free/busy data, this article aims to give you comprehensive coverage of the topic, bringing different sources of information together to illuminate one of the more esoteric parts of Exchange.
Let’s start demystifying free/busy data by looking at where Exchange stores it and how clients publish it.