XADM: P42 Message Delivery Fails Setting ENTRYID (176150)

SYMPTOMS

When attempting to retrieve a P42 signed/encrypted message, the client may experience problems opening the message. Support for the P42 protocol (Secure Data Network Systems Message Security Protocol Support) gives Microsoft Exchange Server DMS users the benefit of adding hardware-based (for example, Fortezza cards) end-to-end security, including signed receipts, non- repudiation, privacy, and content integrity to their communications.

CAUSE

When opening signed/encrypted P42 messages, the DMS extension DLL creates non Unicode one off entry identifiers in a flat entry list (PR_REPLY_RECIPIENT_ENTRIES) for recipients that are to get a reply. The MAPI methods SetProps and GetProps are used to retrieve or modify the PR_REPLY_RECIPIENT_ENTRIES property for the entry identifier. During GetProps, the address type, e-mail address, and display name in the one-off entry identifier is converted to the client's codepage. Because entry identifiers are binary, there is no associated codepage information, except to indicate if it is Unicode. Microsoft Exchange Server assumes that if the entry identifier is not Unicode, the destination must be Unicode.

STATUS

Microsoft has confirmed this to be a problem in Microsoft Exchange Server version 5.0. This problem has been corrected in the latest U.S. Service Pack for Microsoft Exchange Server version 5.0. 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

MORE INFORMATION

To resolve this issue, the address type, e-mail address, and display name are converted to Unicode during SetProps for the property PR_REPLY_RECIPIENT_ENTRIES. During GetProps for this property, no conversion will be done if the one off entry identifier is in Unicode and the destination code page is in Unicode, or if the entry identifier nor the destination code page is in Unicode.