Windows Server 2019 Standard + 50 CAL RDS is a server software solution from Microsoft that provides a stable, secure and scalable platform for managing your applications and services in the cloud or on-premises. This edition includes 50 CALs (client access licenses) for Remote Desktop Services (RDS), allowing remote users to connect to and use virtual applications and desktops securely and efficiently.

Windows Server 2019 Standard + 50 CAL RDS comes with a wide variety of features and management tools, including:

- Active Directory services for identity and network resource access management
- Microsoft Hyper-V for server and operating system virtualization
- Windows Admin Center for centralized management of servers and clusters
- Windows Defender Advanced Threat Protection to protect your system against viruses, malware and other security threats.
- Storage Migration Service for data migration from old to new servers
- Network Controller for the management of software-defined networks

In short, Windows Server 2019 Standard + 50 CAL RDS is a complete server solution for businesses that need to manage their applications and services efficiently and securely, and that want to provide remote access to their users easily and securely.