Microsoft KB Archive/279539

= XADM: Exchange 2000 Server SETUP /FORESTPREP Command Fails with Error 0x80072027 (8231) =

Article ID: 279539

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 Q279539



SYMPTOMS
When you run the setup /forestprep command and try to join a server in the Exchange 5.5 organization, you may receive the following error message:

Setup encountered an error while attempting to bind to the Exchange server :0x80072027 (8231). The requested authentication method is not supported by the server.



CAUSE
This problem occurs because Windows NT Challenge/Response (NTLM) is not enabled as an authentication method on the Lightweight Directory Access Protocol (LDAP) protocol.



RESOLUTION
To enable Windows NT Challenge/Response authentication for the LDAP setting, follow these steps in the Microsoft Exchange Server Administrator program:
 * 1) Check the protocols container.
 * 2) Open the LDAP Protocol Property page.
 * 3) On the Authentication tab, click to select the Windows NT Challenge/Response check box, and then click OK.
 * 4) Stop and then restart the Exchange Server directory service.
 * 5) Run the setup/forestprep command again.

Additional query words: exch2kp2w

Keywords: kberrmsg kbprb KB279539

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