If you manage a Windows Server environment with Remote Desktop Services (RDS), you may need to locate your RDS license key—whether for reinstallation, auditing, or moving to a new license server. This guide explains where RDS license keys are stored, how to retrieve them, and critical legal notes.
Some newer agreements use the Microsoft Customer Agreement (MCA):
If you bought through SHI, CDW, SoftwareOne, or Insight: how to find rds license key
If you purchased RDS CALs via a Cloud Solution Provider (CSP) or a Microsoft Customer Agreement (MCA) (common for small-to-mid businesses), your keys live in the Microsoft 365 Admin Center, not VLSC.
You cannot find what is not there. If you inherited a server and no one ever bought RDS CALs, you will never find a key. The licensing server may have used a trial license (120 days) or a temporary license. If the grace period is over, you must buy new CALs. How to Find an Existing RDS License Key:
Do not waste time trying to "extract" the original 25-character key from a working license server. It is cryptographically hashed and cannot be reversed.
Directly retrieving the RDS license key for reporting might not be straightforward due to security measures. Typically, the focus is on ensuring you have a valid license and are in compliance with Microsoft's licensing terms. If you're having trouble finding your license key or need assistance with RDS licensing, consider contacting Microsoft Support or a licensed Microsoft Partner for help. Sign in to Microsoft 365 Admin Center →
To find your RDS (Remote Desktop Services) license key (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.
Here’s how to locate it: