Microsoft Fix it Solution to Set CopyFolderEx to 1 is Live!
When users access their Free/Busy information, the Outlook Web Access service stops on the computer that is running Exchange 2007
We just released another Fix it Knowledge Base (KB) article. This Fix it addresses the following scenario:
After you migrate the mailboxes, the Free/Busy information for some users seems to be corrupted. When a user accesses their Free/Busy information, the Outlook Web Access service stops on the computer that is running Exchange 2007.