Please specify your username preceded by your domain.
I have a problem with login
a user can not login to CİRESON (end user)
He gets an error "Please specify your username preceded by your domain."
There are many users in AD like this user , other users can login , but this user gets error.
I can not understand "why?" what is wrong?
this user has added to a necessary AD group. I have checked with other user from that AD group, it can login.
What is the error meaning ?