Why this Password didn't work for Userportal & AD

Hi all,

we run into problems authenticating on userportal with AD-user account

Password AA#bb#123456 didn't work

XX.yy.111111 didn't work too

but this works ... 111111.XX.yy

There is no otp-token for the user until now. This should be created in the next step.

Someone has an idea why?