Office2007 has started to use the SEC_RIGHT_SYSTEM_SECURITY bit in open. We don't support this and must reply NT_STATUS_PRIVILEGE_NOT_HELD in order for the client to correctly retry. Capture trace showing this to follow. Jeremy.
Created attachment 3970 [details] Wireshark trace between XP and Windows server using office2007. See packets 531 and 532 for details. Jeremy.
Created attachment 3974 [details] Patch for 3.3.1 and above. Fixes the problem (confirmed).
Confirmed fixed by reporters "Michele Petrazzo - Unipex srl <michele.petrazzo@unipex.it>" and "Schweigert, Udo CERT" <Udo.Schweigert@siemens.com> Jeremy.