Windows Server 2025 - 1 Device CAL is the cloud-ready operating system that supports your current workloads while introducing new technologies that make it easy to transition to cloud computing when you're ready.  A Client Access License (CAL) is required for each user or device that accesses Windows Server or Windows Datacenter server software. This license is for one Device.
 
A Device Client Access License (CAL) is essential for several reasons when accessing Windows Server environments:
 
Access Control:
A Device CAL allows a specific device (e.g., a computer, tablet, or smartphone) to access the server. This is particularly useful in environments where multiple users share a single device, such as in a call center or a shared workstation.
Cost Efficiency:
In scenarios where multiple users use the same device, a Device CAL can be more cost-effective than purchasing individual User CALs for each user. This helps optimize licensing costs while ensuring compliance.
Compliance and Legal Requirements:
Microsoft’s licensing terms mandate that every device or user accessing the server must have a corresponding CAL. This ensures that organizations remain compliant with licensing agreements, avoiding potential legal and financial penalties.
Flexibility in Licensing:
Device CALs provide flexibility in environments with a high device-to-user ratio. They are ideal for situations where devices are shared among multiple users, ensuring that each device is properly licensed regardless of the number of users.
Simplified Management:
Managing Device CALs can be simpler in certain environments, as it involves tracking the number of devices rather than individual users. This can streamline the administrative process and reduce the complexity of license management.
 
By ensuring that each device accessing the server is properly licensed, Device CALs help maintain compliance, optimize costs, and provide flexibility in various organizational setups.