What about my existing LRZ user names?
Your existing LRZ user names like "t1234an" continue to be valid for the time being.
These user names - if you have one - have been issued by your LRZ master user. Besides him nobody knows that you use this user name. Therefore a change of password for this user name does not affect your central TUM account.
In the medium term it is planned to replace user names issued by master users by the ones issued by TUMonline.