Environment
Access Manager 5.1 having 3 Admin Consoles (or more).
Situation
The environment has been configured with 3 (or more) Admin Consoles running on NAM 5.0.x.
Unable to login cause
During the upgrade process, a new Organizational Unit will be created and the Admin Account will be linked in this container. This process is failing when having more then 2 Admin Consoles. There is a limitation on the new Admin UI which allows a maximum of 3 Admin Consoles in the configuration.