Windows Server 2019 - User / Device CALs

1. User CAL: A User CAL is a license assigned to a specific user. This means that the user has access rights to the server and can use its functions regardless of the device they are using to connect to the server. User CALs are assigned based on the number of users, regardless of the number of devices they use.
2. Device CAL: A Device CAL, on the other hand, is assigned to a specific device. With a Device CAL, the device gains access rights to the server and can use its functions, regardless of how many users work on that device.

CAL licenses are essential for legally accessing the functions and resources of Windows Server 2019. Businesses and organizations must purchase the appropriate number of CAL licenses for each user or device that accesses the server. The choice between User CALs and Device CALs depends on the organization's preferences and requirements.

In summary, CAL licenses are a necessary part of ensuring compliance and legal access to Windows Server 2019's features and resources, and the choice between User CALs and Device CALs depends on whether you want to license users or devices for access.