Hello Werner Vermelis
If reactivating the license doesn't work, you may need to try to transfer the license to the new domain. Here are some steps to try:
- Open the Remote Desktop Licensing Manager on your server.
- Right-click on your server name and select "Properties".
- Click on the "Advanced" tab.
- Click "Reactivate Server" and follow the prompts.
- If prompted, select "Transfer the licenses to another license server".
- Enter the name of the new domain and click "Next".
- Follow the prompts to complete the license transfer.
You can refer to the following official documents.
Migrate your Remote Desktop Services Client Access Licenses (RDS CALs) | Microsoft Learn
If this doesn't work, you may need to contact your Microsoft license expertise for further assistance with transferring your license to the new domain.
Best regards,
Karlie Weng