How to Sync Your CAL (Client Access License) in Windows Server
To synchronize or apply Client Access Licenses (CALs) in Windows Server, you must activate the Remote Desktop (RD) Licensing server and install your license key packs through the Microsoft Clearinghouse. While standard Windows Server Core/Device CALs are strictly paper-based documentation for legal compliance, Remote Desktop Services (RDS) CALs require explicit electronic validation and syncing to prevent connection timeouts.
This technical guide walks you through setting up the role, syncing your license tokens, and configuring Group Policy to validate your environment. Step 1: Install the Remote Desktop Licensing Role
Before synchronizing any digital CAL assets, your Windows Server must be configured as an authorized Licensing Server. Open Server Manager from your desktop.
Click Manage in the upper-right corner and select Add Roles and Features. Advance through the prompts to the Server Roles page. Check the box for Remote Desktop Services.
On the Role Services sub-page, check Remote Desktop Licensing.
Complete the wizard and allow the server to install the requested binaries. Step 2: Activate the Server with Microsoft Clearinghouse
To sync with Microsoft’s master licensing database, your deployment must register its unique Server ID.
Move Terminal Services CALs from one license server to another
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