Is more users than RDS licensing keeping employees from connecting?

Our MS Server 2012 R2 RDS Farm has a lot of new users. They are experiencing a huge growth, and having connectivity issues.

** Is there a RDS log that i can see if people are being denied with "There was a problem connecting to the remote resource" due to insufficient licenses OR is it something else?

I've checked mem/cpu on the servers, pretty high so i keep adding as needed, but i should be over licensing as well - how can i tell for sure which is the problem with logs?  Need an answer today, no time to add/purchase software that may help. Please advise