Terminal Server Licensing doesn't assign user licence

Hi,

We've Windows Server 2008 R2 as Terminal Licensing Server, without Remote Desktop Session Host server on the network. Licensing server is member of domain and SRDLS configuration says everything green.
On Licensing Server I can see a lot of Added licences (column "Total licences") but for all of them there is 0 Issued, and a lot of clients are using RDS service. There is no any specific Terminal event logs.

How I can start troubleshooting this issue?

Potential ideas:
- how can I check if Terminal CALs are activated?
- how can I check if my clients are using that wanted Terminal License server?