Microsoft KB Archive/290295

= XADM: Error Message Occurs When You Create a Connection Agreement =

Article ID: 290295

Article Last Modified on 2/28/2007

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APPLIES TO


 * Microsoft Exchange 2000 Server Standard Edition

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This article was previously published under Q290295



SYMPTOMS
When you are trying to create a new Connection Agreement between an Exchange Server 5.5 computer and an Exchange 2000 Server computer, you may receive the following error message:

Unable to contact the Exchange server, please ensure that your connections are configured correctly.

ID no: c103aa1d



CAUSE
This issue can occur if there is a port conflict. If you are installing the Active Directory Connector (ADC), or if you installed the Exchange Server 5.5 computer on a global catalog server, port 389 is used.



RESOLUTION
To resolve this issue:
 * 1) Start the Microsoft Exchange Server Administrator program on the Exchange Server 5.5 computer that you are attempting to connect to with the ADC.
 * 2) Click to expand the Configuration container for the site, click Protocols, and then click LDAP.
 * 3) Click the General tab, change the port number that is used for the Lightweight Directory Access Protocol (LDAP) site to Port 390, or some other unused port.
 * 4) Stop and restart the Exchange Server services on this Exchange Server 5.5 computer.
 * 5) On the Windows 2000-based server, click Start, click Programs, and then click Administrative Tools.
 * 6) Double-click Active Directory Connector, click the recipient Connection Agreement that you want to modify, and then configure the ADC and the recipient Connection Agreement.
 * 7) Click the Connections tab, and then change the default port setting from 389 to 390.

Additional query words: exch2kp2w CA GC

Keywords: kberrmsg kbprb KB290295

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