A Rights Management Services Client Access License (CAL) and a Windows Server Client Access License (CAL) is required for each user or device that accesses the Rights Management Services software. You'll need a user or device CAL for each user or device that accesses the software.
 
Let's dive into why you need a Rights Management Services (RMS) 2025 Device CAL:
Device-Specific Access:
An RMS Device CAL is essential for allowing a specific device to access RMS features. This is particularly useful in environments where multiple users share a single device, such as in a shared office or a public kiosk.
Cost-Effective for Shared Devices:
If you have more users than devices, a Device CAL can be more economical. Instead of buying a license for each user, you just need one for each device. This can save costs in scenarios where devices are shared among many users.
Compliance with Licensing Requirements:
Microsoft requires that every device accessing RMS has a corresponding CAL. This ensures that your organization stays compliant with licensing agreements, avoiding any potential legal or financial penalties.
Enhanced Security and Control:
RMS Device CALs help manage and secure access to sensitive information by ensuring that only authorized devices can access protected content. This is crucial for maintaining the integrity and security of your organization's data.
Simplified Management:
Managing Device CALs can be simpler because you only need to track the number of devices, not individual users. This can make administration more straightforward and less time-consuming.
 
In summary, RMS Device CALs are crucial for controlling access, staying compliant, saving costs, enhancing security, and simplifying management in environments where devices are shared among multiple users.