La clé qui change le nom m'a bien servi.

Apologies for the late reply, I was out of office for a while now.

Try adding the license server name here and see if it works:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\TermService\Parameters\LicenseServers

To select a specific license server, follow these steps, and then quit Registry Editor.

1. Click Start, click Run, type regedit, and then click OK.
2. Locate and then click the following key in the registry:
   HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\TermService\Parameters
3. On the Edit menu, point to New, and then click Key.
4. Name the new key "LicenseServers"
5. Locate and then click the following key in the registry:
   HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\TermService\Parameters\LicenseServers
6. For each licensing server to which you would like to point the Terminal Services server, point to New on the Edit menu, and then click Key.
7. Name the new key "ServerName" where ServerName is the NetBIOS name of the license server that you want to use, and then press ENTER.

Note: The new key name can be any of the following designations that represent the license server:
-->The NetBIOS name of the server
-->The fully qualified domain name (FQDN) of the server
-->The IP Address of the server

8. Restart your computer.

HTH and once again sorry for replying late.