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Unable to contact the Exchange 5.5 server when configurating ADC

Posted on 2002-07-17
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Last Modified: 2010-03-05
When I am trying to create a new Connection Agreement between an Exchange Server 5.5 computer and an Exchange 2000 Server computer, I receive the following error message:

Unable to contact the Exchange server, please ensure that your connections are configured correctly.
ID no: c103aa1d

This problem has been exactly stated in
  http://support.microsoft.com/default.aspx?scid=kb;EN-US;q290295

I have followed the solution in this page. However no matter what port I selected for LDAP in my Exchange Server (In fact I have tried 390 and 30000), I still could not connect to my Exchange Server.

Could you please give a solution for my problem?
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Question by:quang051097
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by:kevala
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Did you mean Exchange 5.5 on Windows 2000???

Anyway,

I assume this is a regular connection agreement and not an interorganization connection agreement, right??

What about the account you are using?
Are you using the Exchange service account? (and entering the correct credentials?

Can you specify a different DC to see what happens?
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by:quang051097
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Why not Exchange 5.5 on Win2K? It run very well in my office.
Anyway, my problem is that the account I used doesn't have enough right (even I have assigned 'Service Account Permission' to this account) to change LDAP port in Exchange 5.5.
When I change the LDAP port from 389 to 390 by running
 ADMIN
It didn't show any warning about the account's right.
But when I run
 ADMIN /R
to change LDAP port, it showed the warning message.
I just don't know why.
After I logon the server using Exchange Service Account,
I can change LDAP port to 390 and it worked now.
Thanks for all your help.
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kevala earned 100 total points
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I was just confirming that you meant to say Exchange 5.5 on Windows 2000. I agree that it runs great.

So, i was correct about it being permissions, and having to use the service account?
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by:quang051097
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I have to thank some other expert whose comments for some reason just be here and then disappeared without trace, which gave me a link to MS support site so that I could try 'ADMIN -R' instead of 'ADMIN'. Otherwise, I will never see any error message.
Anyway, thanks Kevala for your correct recommendation.
100 points goes to you!
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