Our Jenkins server uses Active Directory for login management and the Security Realm in Jenkins is set to: Unix user/group database. We are currently running release 2.138.4 in Jenkins and everything works great. If I update to any release above 2.138.4 all logins to Jenkins using a user in AD stop working, a local user can still login. We have been trying to figure out what is the cause, but have been unable to track it down for some time now. Has anyone else run into something like this?