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LDAP port 389

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by tim marshall - houston

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I am using the LDP program in the Win2K Support Tools to connect to the Exchange Server on Port 389 or 390 and I keep getting the message "Error <0x0>: Fail to connect to exch." (exch is the name of my Exchange Server). I can't connect from any server. Where should I start to troubleshoot this from .

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by joseph moore

Can you Telnet to the Exchange server on port 389 (the LDAP port)?
Try this from the Command Prompt:
TELNET exch 389

Where "exch" is the name of the Exchange server that is causing all of the problems. If it works, then you will get a blank Telnet screen. If it does NOT connect, then you will get the failed connection message.
Also if it does not work, try it with the IP address instead of the machine name, just to make sure it is not a name resolution problem. If the IP works but the name doesn't then it IS a name resolution problem!

If the Telnet connection does work, then make sure LDAP is running and on port 389:

Start the Administrator program.

Click to expand the Site container, and then click to expand the Configuration container.

Click Protocols , and then double-click LDAP .

Click the General tab, and then verify that the port number is set to 389 .

hope this helps

by joseph moore

The "Administrator" program refers to the Exchange Administration program that you use to manage mail domains, sites, receptients, etc. The normal Exchange admin program.

hope that clears that up!

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