Windows Server 2019 Remote Desktop Services (RDS) CAL unlocks the full Remote Desktop capabilities of Windows Server 2019. This CAL is added on top of a standard Windows Server CAL and enables access to virtual desktops, applications, and Windows features from any location. With RDS, users can take advantage of session virtualization, Virtual Desktop Infrastructure (VDI), and secure remote connectivity for seamless work from anywhere with an internet connection.

Working Safely and Reliably

Users with Windows Server 2019 RDS User CAL benefit from a highly secure and always-available operating environment.
Microsoft has implemented a multi-layered security system to protect against modern threats, including:

• Intrusion prevention

• Windows Defender

• Encryption services

• Administrative tools for secure configuration

Even if one security layer is bypassed, multiple safeguards remain active to protect user data and sessions.

Licensing Requirements

Remote Desktop Services is a core component of Windows Server 2019.
To use Remote Desktop Protocol (RDP) or Terminal Services, you must have the following licenses:

Required:

1. Windows Server 2019 Server License

2. Windows Server 2019 CAL (Per User or Per Device)

3. Windows Server 2019 RDS CAL (Terminal Server CAL) – required for remote desktop sessions

A Windows session means the server is hosting a graphical user interface (GUI) for a user or device, whether through standard RDS or another delivery technology.

User CAL vs Device CAL

RDS User CAL

Allows one user to access Windows Server sessions from any device.

RDS Device CAL

Allows one device (used by any user) to access Windows Server sessions.

Both types can run together in the same environment, and the license server can manage both modes simultaneously.

Technical Licensing Notes

• Licensing mode can be set per terminal server under:
  Terminal Services Configuration → Server Settings → Licensing
  Options are Per User or Per Device.

• Windows sessions cannot be used in Pro Server mode.

• An RDP CAL is not required when connecting to the console session, which is the session running directly on the server’s primary keyboard and display.