XADM: PR_MESSAGE_FLAGS MSGFLAG_UNMODIFIED Bit Not Set Correctly

• Microsoft Exchange Server, version 5.5

SYMPTOMS

A MAPI transport provider explicitly sets the MSGFLAG_UNMODIFIED bit for the PR_MESSAGE_FLAGS property of a new message during the call to the IXPLOGON::StartMessage() method, and the bit is not set on the message when delivery is set to the Exchange Server information store. If default delivery is changed to a personal folder (PST) file, the new message will have the MSGFLAG_UNMODIFIED bit set.

CAUSE

The Exchange Server information store was explicitly setting the MSGFLAG_UNMODIFIED bit for the PR_MESSAGE_FLAGS property only in the case where the information store delivered the message. When a transport provider is "receiving" new messages, messages are essentially created in the Inbox, not delivered.

WORKAROUND

To work around this problem, set default delivery for the messaging client to a personal folder.

STATUS

Microsoft has confirmed this to be a problem in Exchange Server version 5.5. This problem has been corrected in the latest U.S. Service Pack for Microsoft Exchange Server version 5.5. For information on obtaining the Service Pack, query on the following word in the Microsoft Knowledge Base (without the spaces):

S E R V P A C K

Keywords : kbusage XADM
Version : WINDOWS:5.5
Platform : WINDOWS
Issue type : kbbug