Hey, I am rapidly balding on this one.. After upgrade of exchange everything is working great except update of free/busy data. It is Exchange 2003 on Server 2003 In the App eventlog I am getting this.. ----------- Type: Error Source: MSExchangeFBPublish Event ID: 8207 Event Time: 20/10/2004 17:03:03 User: n/a Computer: ORION Description: Error updating public folder with free-busy information on virtual machine ORION. The error number is 0x8004010f. For more information, click http://www.microsoft.com/contentredirect.asp. -------- I have searched high and low and am not having any joy.. Any help appreciated. Cheers Simon