You can, however, use Remote Desktop Licensing Manager to view the of installed CALs—including how many are installed, how many have been issued, and the CAL type. To view the specific activation key, refer to your original purchase documentation or contact your vendor directly.
Windows allows a 120-day licensing grace period. Once expired, connections block until the License Server ID is explicitly mapped to the Session Host.
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Confusion often arises because the term "license key" can refer to several different things in the RDS licensing ecosystem. Depending on how you purchased your licenses, you may be looking for: how to find rds license key
If you are trying to find the product key for the Windows Server OS itself (which often gets confused with the RDS CALs), you can use a PowerShell script to pull it from the BIOS or Registry.
| You need | Look for | |----------|-----------| | (to install on license server) | 25-character code from VLSC or reseller | | RDS CAL key pack ID (already installed on server) | Found in Licensing Manager, cannot reinstall elsewhere | | Windows Server product key | Different from RDS CAL – not for licensing users/devices |
Under the tab, you can often see the "License Program" (like Open License or Retail) used to activate it. You can, however, use Remote Desktop Licensing Manager
If the server was activated via an older licensing methodology, you can pull the digital product ID directly from the registry using this command: powershell
Would you like help identifying which type of RDS CAL you have (per user vs. per device, or version)?
Once RDS CALs are activated and assigned, you cannot retrieve the original activation key from the server itself. Once expired, connections block until the License Server
A 25-character product key used to activate the License Server itself.
: Search your inbox for a confirmation email from Microsoft or your reseller. It usually contains the License Key or Agreement Number .