Microsoft Windows Server 2022 RDS 1 Device CAL ESD
Understanding the RDS CAL model
There are two types of RDS CALs:
- RDS Per Device CALs
- RDS Per User CALs
The following table outlines the differences between the two types of CALs:
UNDERSTANDING THE RDS CAL MODEL
| Per Device | Per User |
|---|---|
| RDS CALs are physically assigned to each device. | RDS CALs are assigned to a user in Active Directory. |
| RDS CALs are tracked by the license server. | RDS CALs are tracked by the license server. |
| RDS CALs can be tracked regardless of Active Directory membership. | RDS CALs cannot be tracked within a workgroup. |
| You can revoke up to 20% of RDS CALs. | You cannot revoke any RDS CALs. |
| Temporary RDS CALs are valid for 52–89 days. | Temporary RDS CALs are not available. |
| RDS CALs cannot be overallocated. | RDS CALs can be overallocated (in breach of the Remote Desktop licensing agreement). |
When you use the Per Device model, a temporary license is issued the first time a device connects to the RD Session Host. The second time that device connects, as long as the license server is activated and there are available RDS CALs, the license server issues a permanent RDS Per Device CAL.
When you use the Per User model, licensing is not enforced and each user is granted a license to connect to an RD Session Host from any number of devices. The license server issues licenses from the available RDS CAL pool or the Over-Used RDS CAL pool. It's your responsibility to ensure that all of your users have a valid license and zero Over-Used CALs—otherwise, you're in violation of the Remote Desktop Services license terms.
An example of where one would use the Per Device model would be in an environment where there are two or more shifts using the same computers to access the RD Session Host(s). The Per User model would be best for environments where users have their own dedicated Windows device to access the RD Session Host(s).
To ensure you are in compliance with the Remote Desktop Services license terms, track the number of RDS Per User CALs used in your organization and be sure to have enough RDS Per User CALs installed on the license server for all of your users.
You can use the Remote Desktop Licensing Manager to track and generate reports on RDS Per User CALs.
RDS CAL version compatibility
The RDS CAL for your users or devices must be compatible with the version of Windows Server that the user or device is connecting to. You can't use RDS CALs for earlier versions to access later versions of Windows Server, but you can use later versions of RDS CALs to access earlier versions of Windows Server.
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