Microsoft KB Archive/280282

= XCCC: Event ID 16387 Is Logged When Trying to Log On Through Instant Messenger =

Article ID: 280282

Article Last Modified on 2/27/2007

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APPLIES TO


 * Microsoft Exchange 2000 Server Standard Edition

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This article was previously published under Q280282



SYMPTOMS
You may see the following error in the Application log:

Event ID: 16387

Source: MSExchangeIM

Category: Security

Type: Error

Description: The requested principal http://im.host.com/instmsg/aliases/joeuser could not be matched with the authenticated user. (Error 1).



CAUSE
You receive this error message as a warning message because you are attempting to log on to Internet Messaging with valid but inappropriate credentials. For example, you are using the credentials of another user.



STATUS
Microsoft has confirmed that this is a problem in Microsoft Exchange 2000 Server.

Additional query words: instmsg 16387 exch2kp2w

Keywords: kbbug kberrmsg kbpending KB280282

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