[JENKINS-59448] Distinct jenkins userids for same AD user

Jenkins creates distinct user ids for the same active directory user,  based on login name format.

Users can use  either "domainName\userName"  or  "userName@​domainName"  format for authentication.

Jenkins should check the identity before creates new user id for the same user with different login format.

 

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Originally reported by lakatosjaguar, imported from: Distinct jenkins userids for same AD user

• status: Open
  
• priority: Minor
  
• component(s): active-directory-plugin
  
• resolution: Unresolved
  
• votes: 5
  
• watchers: 7
  
• imported: 2025-12-07
  

Raw content of original issue

Jenkins creates distinct user ids for the same active directory user,  based on login name format.


Users can use  either "domainName\userName"  or  "userName@domainName"  format for authentication.


Jenkins should check the identity before creates new user id for the same user with different login format.


 

environment

```
Jenkins version 2.195

Active directory plugin version 2.16
```

No source files, tests, or entry points are named in the issue. Start by locating the active-directory-plugin authentication code that creates Jenkins user IDs, then compare the two login formats for the same AD identity. Done means equivalent identities no longer create distinct Jenkins users, with regression coverage for both formats.

Written by the indexing model from the issue text.