User Limit for this Account has been exceeded

This is a common issue when trial accounts are set up. If you set up a trial for Meetings you will need to use the Meetings section of Connect. If you signed up for a Virutal Classroom trial, then you will need to use Virtual Classrooms in the Training section of Connect. If you signed up for a Seminar trial, then you will need to use the Seminars section of Connect. Each section has a group that you must be a member of to unlock the full use of those live meeting functions. 

To host a Meeting you need to be in the Meeting Host group. To host a Virtual Classroom you need to be in the Named Virutal Classroom Manager group. To host a Seminar you need to be in the Named Webinar XXX group, where XXX is the seating capacity of the Seminar room you purchased. 

If you use the Meeting section when you have a trial of the other two options, the Meeting room will have a max capacity of 1, and anyone who attempts to join while you are in the room will see the message you describe above.