Sometimes we are not able to login to a machine via Remote Desktop because maximum no of allowed users is over.
There is a trick to by pass this problem.
I would like to explain it by a live example.
Sometimes, Me & A friend, both need to work on a machine via Remote Desktop simultaneously.
But only one person is allowed at a time because of this restriction.
What we do is, one person log in there twice & then log off one session. At this moment if another person tries to login, he become able to login.
I am not sure, whether this will work in all conditions, just thought to share with you.