After you configure public folder replication on a Hub Transport server that has Microsoft Exchange Server 2007 installed, the EdgeTransport.exe process randomly stops responding. Additionally, the following event is logged in the Application log:
This issue occurs when Edgetransport.exe processes the Mailbox GUID attribute of the public folder replication content messages. The value of the Mailbox GUID attribute is NULL. This causes an exception to be thrown.
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
For more information about public folder replication, visit the following Microsoft TechNet website: