Microsoft KB Archive/316654

= XADM: &quot;Authentication&quot; Error Message with Instant Messaging =

PSS ID Number: 316654

Article Last Modified on 6/13/2003

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The information in this article applies to:


 * Microsoft Exchange 2000 Server

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This article was previously published under Q316654



SYMPTOMS
When Instant Messaging users try to log on for the first time, they may receive the following error message:

Exchange Instant Messaging Authentication Failure. The person logged on to this computer does not have permission to use the specified e-mail address. Please supply an e-mail address and logon credentials for that address.



CAUSE
This issue may occur when the Instant Messenger virtual server is incorrectly named with the NetBIOS name of the server instead of the Fully Qualified Domain Name (FQDN) of the server.



RESOLUTION
To resolve this issue, delete the faulty records and re-create the virtual server. To do so, follow these steps:  Turn off Instant Messaging for all users:  Click Start, point to Programs, point to Microsoft Exchange, and then click Active Directory Users and Computers. In the console tree, double-click the domain, and then click Users. Select all Instant Messaging enabled users, right-click your selection, and then click Exchange Tasks. Click Disable Instant Messaging, click Next twice, and then click Finish. </li> Delete the DNS _rvp record:  Start the DNS.</li> Expand the zone that you want, and then click _tcp.</li> In the right pane, click _rvp, and then press DELETE.</li> Click OK to confirm that you want to delete the record _rvp from the server.</li></ol> </li> Delete the Instant Messenger virtual server:  Click Start, point to Programs, point to Microsoft Exchange, and then click Exchange System Manager.</li> Double-click your server, double-click Protocols, and then click Instant Messaging (RVP).</li> Right-click your Instant Messaging virtual server, and then press DELETE.</li> Click Delete to complete the removal of the Instant Messaging virtual server.</li></ol> </li> Rebuild Recipient Update Services (RUS):  Click Start, point to Programs, point to Microsoft Exchange, and then click Exchange System Manager.</li> Double-click Recipients, and then click Recipient Update Services.</li> <li>Right-click each Recipient Update Service listed in the right pane, and then click Rebuild on the shortcut menu.</li></ol> </li> <li>At the command prompt, type ipconfig /flushdns, and then press ENTER.</li> <li>Restart your server.</li> <li>Rebuild the Instant Messenger virtual server. When you type the name of the server, make sure that it is the Fully Qualified Domain Name (FQDN). The FQDN will have the following format:

ServerName.DomainName.com

</li> <li>Turn on Instant Messaging for all users.NOTE: When you log on to Instant Messenger, use the following format:

UserName@InstantMessgingServerName.DomainName.com

</li></ol>

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MORE INFORMATION
For additional information about how to install Instant Messaging Service, click the article number below to view the article in the Microsoft Knowledge Base:

266643 XADM: How to Install Instant Messaging Service

Keywords: kbprb KB316654

Technology: kbExchange2000Search kbExchange2000Serv kbExchange2000ServSearch kbExchangeSearch

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