RDS User CAL vs. Device CAL – Which do I need?
A guide to choosing the right licensing model for your business.
When setting up a Remote Desktop environment, one of the most common questions is: "Should I buy User CALs or Device CALs?" Choosing the wrong type can lead to unnecessary costs or compliance issues.
Option 1: Per User CALs
A User CAL is assigned to a specific human being. That user can access the server from an unlimited number of devices.
Best for:
Option 2: Per Device CALs
A Device CAL is assigned to a specific physical device (computer, tablet, thin client). An unlimited number of users can use that device to connect to the server.
Best for:
Comparison at a Glance
| Feature | Per User CAL | Per Device CAL |
|---|---|---|
| Licensed Entity | The Person | The Computer/Device |
| # of Devices Allowed | Unlimited | 1 Specific Device |
| # of Users Allowed | 1 Specific User | Unlimited |
| Tracking | Not strictly enforced by the server (honor system/audit) | Strictly enforced (server assigns temporary token) |
| Ideal Scenario | Modern Office / Remote Work | Call Centers / Shift Work |
The Verdict
Choose User CALs if: You have more devices than users (e.g., 10 employees with 20 devices).
Choose Device CALs if: You have more users than devices (e.g., 50 employees sharing 20 computers).
Author Bio
Microsoft Certified Professional
With over 20 years of experience deploying and managing enterprise Windows Server environments, Keloth leads technical implementation at RDS CAL Store. He specializes in Remote Desktop Services infrastructure, secure remote architecture, and helping IT teams seamlessly scale their official licensing.
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