[JENKINS-33313] Authentication against more than one active directory fails

In Security realm, we have enabled Active Directory authentication and three domains are configured as comma seperated values. It was working until version active-directory-plugin 1.33 and after upgrading to 1.42, it stopped working. It authenticates users from the first domain, but fails for other domains.

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Originally reported by sagayd, imported from: Authentication against more than one active directory fails

• status: Open
  
• priority: Critical
  
• component(s): active-directory-plugin
  
• resolution: Unresolved
  
• votes: 0
  
• watchers: 2
  
• imported: 2025-12-07
  

Raw content of original issue

In Security realm, we have enabled Active Directory authentication and three domains are configured as comma seperated values. It was working until version active-directory-plugin 1.33 and after upgrading to 1.42, it stopped working. It authenticates users from the first domain, but fails for other domains.

• environment: Jenkins 1.642.1

Start by reproducing authentication with three comma-separated Active Directory domains on Jenkins 1.642.1, comparing active-directory-plugin 1.33 with 1.42. Trace the authentication path to determine why only the first domain succeeds; done means users from all configured domains authenticate successfully.

Written by the indexing model from the issue text.