Microsoft KB Archive/299588

= XCCC: Sender's Name Is Displayed as &quot;Unknown&quot; When Sending with Outlook 2002 by Using POP3 =

Article ID: 299588

Article Last Modified on 2/27/2007

-

APPLIES TO


 * Microsoft Exchange 2000 Server Standard Edition
 * Microsoft Exchange 2000 Enterprise Server

-



This article was previously published under Q299588





SYMPTOMS
When you use Microsoft Outlook 2002 configured for a Post Office Protocol version 3 (POP3) account to send a multimedia message, if you move the cursor over the attachment, the sender may be displayed as &quot;unknown,&quot; instead of the actual sender's name.



CAUSE
This behavior occurs because there are no Messaging Application Programming Interface (MAPI) transport providers in a POP3 profile in Outlook 2002; therefore, you cannot obtain any identity by means of MAPI. In Outlook 2002, POP3, as well as Internet Message Access Protocol, Version 4rev1 (IMAP4) and Microsoft MSN Hotmail, are not MAPI services. The only service that is available in the profile that you're describing is the personal folder (.pst) file, which is not an identity provider.

As part of the Outlook extension, the code tries to obtain the current Outlook user name by using MAPI. The code uses session object to query identity, open the identity object, and then obtain the display_name property from the identity object. In versions of Outlook that are earlier than Outlook 2000, the code returns the proper Outlook user name; in Outlook 2002, when the code accesses a POP3 account, the code returns &quot;Unknown&quot; as the display name.

This behavior occurs only when Outlook 2002 gains access to a POP3 account. This behavior does not occur if a normal Microsoft Exchange 2000 account is running the Microsoft Exchange Server information service in the Outlook 2002 profile.



STATUS
This behavior is by design.

Additional query words: ol10 ol2k2

Keywords: kbbug kbnofix KB299588

-

[mailto:TECHNET@MICROSOFT.COM Send feedback to Microsoft]

© Microsoft Corporation. All rights reserved.