┌───────────────────────────┐ │ RDS CAL Selection │ └─────────────┬─────────────┘ │ ┌───────────────────────┴───────────────────────┐ ▼ ▼ ┌───────────────┐ ┌───────────────┐ │ Per User CAL │ │ Per Device CAL│ └───────┬───────┘ └───────┬───────┘ ├─► Unlimited devices per user ├─► Unlimited users per device ├─► Ideal for remote hybrid staff ├─► Ideal for shift work stations └─► Not monitored strictly by server └─► Revokable after expiration Per User CALs Assigned to specific users. Allows access from unlimited devices. Ideal for hybrid remote workers. Not strictly enforced by server. Per Device CALs Assigned to physical machines. Allows unlimited users per machine. Perfect for shift work stations. Revocable after license expiration. Step-by-Step Installation Guide

Without a properly configured license server with installed CALs, RDS sessions will stop working after the grace period (120 days for most recent Windows Server versions).

Understanding the Remote Desktop Licensing Manager A Remote Desktop Licensing Manager (RD Licensing Manager) is a crucial tool for Windows Server network administration. It manages Client Access Licenses (CALs) required for connecting to a Remote Desktop Session Host (RD Session Host). Core Functions

Error "No Remote Desktop license servers available". Cause: Network ports are blocked by firewall. Fix: Open UDP/TCP Port 135 and Port 445.

The tool serves three primary functions critical to the operation of RDS environments:

Microsoft needs to modernize this tool, ideally moving the reporting and management capabilities entirely into the Windows Admin Center or Azure Arc to provide a more cohesive management experience for modern IT pros.

System administrators often face standard configuration bottlenecks. Grace Period Timeout Users cannot connect after 120 days. Cause: The licensing server is unconfigured. Fix: Define the licensing server IP via Group Policy. License Unavailable

The Remote Desktop Licensing Manager (RD Licensing Manager) is a native Microsoft Management Console (MMC) snap-in used to configure and manage Remote Desktop Services (RDS) licensing. While it is an essential utility for maintaining compliance and ensuring uninterrupted access to terminal servers, it is often viewed by IT administrators as a functional but archaic tool, hampered by a rigid interface and complex activation processes.

To open the tool, navigate to . Common Administrative Tasks Activate the Remote Desktop Services license server