Cannot find the Terminal Server Computers group

Hello,

I configured a TS gateway on a SBS 2008 and it works correctly.

However, on the host server (VM 2012), only members of the Domain Admin group can connect.

The diagnostic tools of RDS services mention an error :
"License server MYSERVER cannot issue TS CALs to the terminal server because the "License server security group" Group Policy setting is enabled."

And the suggested solution :
"Add the computer account for the terminal server to the Terminal Server Computers group on the license server.".
But I cannot find that group in the AD...

Thanks in advance for your help.