I have an issue with an SA-2500 cluster running 7.1R2 with a concurrent user license limit of 100 users.
When a user tried to invoke Terminal Services he got the following message :- Maximum number of licensed sessions are already in use for this appletÓ.
When I checked the stats there were around 12 users and in the user activity log it had the following :- "............Connection denied since maximum number of licensed sessions are already in use for the default Hob RDP applet_."
I was only aware of per node or per cluster concurrent user license and could not see how or where to set user limit license for any individual component such as this applet.
AFAIK, by default, the SA supports only 2 HOB applet sessions. In case you require to use more than 2 connections, you would need to install a separate HOB applet license on the SA.
As Vijish pointed out, you need to have the ACCESS-RDP license for more than 2 users to connect: do you have this license installed?