Your first stop is the server itself. While it won't show you the original alpha-numeric key, it provides the vital License Server ID needed to retrieve or reactivate them. Open the Tool Administrative Tools Remote Desktop Services Remote Desktop Licensing Manager Find Your ID : Right-click your server name and select Properties License Server ID will be listed at the bottom. Run a Report : You can also right-click the server, select Create Report , and click to see a summary of what is currently installed. Step 2: Retrieve Numbers from Microsoft Portals If you are trying to find the numbers to install them on a server, you need to look in your volume licensing accounts. Microsoft 365 Admin Center Your products Volume licensing , look for your RDS CAL agreement. You are looking for an Agreement Number Authorization Number Volume Licensing Service Center (VLSC) : For older "Open License" purchases, log into the and navigate to Relationship Summary . Click your License ID to see the Authorization and License numbers. Step 3: When the Key is "Missing"

Finding your RDS license key can be a challenge, but it's not impossible. By following these steps, you should be able to locate your RDS license key and activate your RDS features. Remember to keep your RDS license key safe and secure, as it's a critical component of your remote desktop infrastructure.

Click on the specific to view details, including the Authorization Number and License Number. Retail/Boxed Purchase:

To find your (also called a RDS CAL key or license code), you typically need to check where your organization stores Volume Licensing information. RDS CALs are not product keys entered during Windows setup—they are licenses added to a Remote Desktop License Server .

on your server. While this won't show you the original purchase key, it is the ID you need if you ever have to call Microsoft to move those licenses to a new server. How to Retrieve or "See" Your Licenses