: Open gpedit.msc and navigate to Computer Configuration > Administrative Templates > Windows Components > Remote Desktop Services > Remote Desktop Session Host > Connections . Enable the policy Restrict Remote Desktop Services users to a single Remote Desktop Services session to prevent users from consuming multiple slots.

By default, Windows Server 2012 R2 allows concurrent administrative RDP sessions without needing any patches or Remote Desktop Services (RDS) licenses. To ensure this is active:

Help you for your exact Windows build.

Before using a patch, you can increase RDP capacity using native tools, though this usually still limits you to sessions unless you purchase RDS CALs:

While the patch offers a quick workaround for session limits, it introduces significant operational, security, and legal vulnerabilities. 1. Legal and Licensing Violations