Tuesday, 16 Jul 2024

VMware vCenter Server 6.7 — Troubleshooting LDAP Binding Issues

A vCenter Single Sign-On service error occurred

vCenter version: VMware-VCSA-all-6.7.0-14070457
UCS version: 4.4-1 errata196 (Blumenthal)

If you are experiencing issues with binding VMware vCenter Server to UCS through LDAP, you are not alone. This article will guide you through the process to help you resolve the problem.

Configuring SSO through “Active Directory Domain”

To begin, follow these steps in your vCenter:

  1. Go to Administration > SSO > Configuration > Active Directory Domain.
  2. Select “Join AD” and proceed to join the domain.
  3. Reboot your vCenter. (Note: You can also use vCenter CLI commands to replicate this process.)
  4. After the reboot, navigate to Identity Source > Add Identity Source.
  5. However, when you go to Single Sign-On > Users and Groups and select the newly added domain, you encounter the error message “A vCenter Single Sign-On service error occurred”.

Upon further examination of the /var/log/vmware/sso/ssoAdminServer.log, you may notice the following error every time you attempt to search UCS:

[WARN ][2019-07-30T16:55:40.650-04:00][jyqan3yc-174-auto-4x-h5:70000052] ServerUtils - cannot bind connection: [ldap://taxmducc01-v.cybertax.cso.com, null]
[ERROR][2019-07-30T16:55:40.650-04:00][jyqan3yc-174-auto-4x-h5:70000052] ServerUtils - cannot establish connection with uri: ldap://taxmducc01-v.cybertax.cso.com
[INFO ][2019-07-30T16:55:40.650-04:00][jyqan3yc-174-auto-4x-h5:70000052] ActiveDirectoryProvider - removeDcInfo - domain [CYBERTAX.CSO.COM], domainFQDN [taxmducc01-v.cybertax.cso.com], domainIpAddress []
[ERROR][2019-07-30T16:55:40.650-04:00][jyqan3yc-174-auto-4x-h5:70000052] ActiveDirectoryProvider - Failed to get non-GC connection to domain CYBERTAX.CSO.COM - domain controller might be offline com.vmware.identity.interop.idm.IdmNativeException: Native platform error [code: 40022][LW_ERROR_PASSWORD_MISMATCH][The password is incorrect for the given username]

You may have also attempted to integrate directly with the “Active Directory over LDAP” function but encountered the error message “Check the network settings and make sure you have network access to the identity source”. This is unusual as the administrator username and password successfully worked for AD join through the web and CLI.

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Here are a few troubleshooting steps you can try:

  • Note: Try changing the user to cn=Administrator,cn=users,dc=cybertax,dc=cso,dc=com or using the NETBIOS name CYBERTAXAdministrator. However, neither approach seems to resolve the issue.
  • Trouble shooting: Deploy a new vCenter (for testing purposes) and integrate it with a Windows Domain. If it works without any problems, it could help narrow down the cause of the issue.

If none of the above steps resolve the problem, you might be missing something crucial. Below are some frequently asked questions that might provide further insight.

Frequently Asked Questions

  1. Q: Why can’t my vCenter Server bind to UCS through LDAP?
    A: This issue can occur due to various reasons, such as incorrect password, network settings, or domain controller unavailability. You can try changing the user or troubleshooting the network settings to resolve the problem.

  2. Q: What should I do if changing the user or troubleshooting network settings doesn’t work?
    A: If alternative approaches fail, consider seeking assistance from VMware support or the VMware community. They may be able to provide further guidance and assistance based on your specific environment and configuration.


Binding vCenter Server to UCS through LDAP can be a challenging task. However, by following the steps outlined in this article and considering the frequently asked questions, you have a better chance of resolving the issue. Remember to double-check your network settings, ensure the correct username and password are used, and seek assistance when needed.

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