Unable to authenticate with the LDAP server. Verify the username and password are correct.

Technical Articles ID: KB66105
Last Modified: 3/1/2022

Environment

ePolicy Orchestrator (ePO) 5.x

Problem

You see the following error after you configure an LDAP server:

Unable to authenticate with the LDAP server. Verify the username and password are correct.

NOTE: You see this error when you click Menu, Configuration, Registered Servers, New Server, and select LDAP Server:

This error can display in the following situations:

Creating a permission set
Editing the name and users of an existing permission set (the top-right edit link when editing a permission set)
Managing Policy Assignment Rules when using the LDAP browser
Using the System synchronization tab when using an LDAP Registered Server to browse the tree

Solution

To troubleshoot the issue, click Test Connection on the LDAP Registered Server page, and make a note of the error message.

Possible error messages and explanations:

Unable to communicate
This situation indicates that the ePO server can't resolve the LDAP server name provided.
1. Attempt to ping the LDAP server from the command line. The server name needs to be a valid DNS host name for the LDAP server. A NetBIOS domain name does not work.
2. Verify that the port specified, if any, is valid for the LDAP server. The default port used is 389. Verify that there are no firewalls preventing the communication from occurring.
  - If you use SSL, specify the correct port. Port 636 is commonly used for LDAP over SSL.
  - If you do not use SSL, verify the port number. Not specifying a port defaults to port 389, which is the normal port for LDAP without SSL.
Unable to authenticate
This situation indicates that the username or password provided is incorrect.

NOTE: It might also indicate the account being used is trusted only through a one-way or external trust, which is not supported. Use an account on the Active Directory server itself instead.
If you see an error message other than the ones listed, the user account might not have enough permissions to perform the operations. Try using an account with increased permissions.

Affected Products

ePolicy Orchestrator 5.10.x
Troubleshooting

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Unable to authenticate with the LDAP server. Verify the username and password are correct.

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Solution

Affected Products

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Unable to authenticate with the LDAP server. Verify the username and password are correct.

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