Device CALs (as opposed to User CALs) license a specific device to access the server, which suits environments where multiple people share the same workstation or terminal (shift work, shared kiosks, point-of-sale terminals) - the licence follows the machine rather than the individual user logging in. This 50-pack covers up to 50 devices connecting to one Windows Server 2025 environment for core server services (file/print sharing, authentication, and other server roles that require CAL coverage). Businesses running or planning a Windows Server 2025 deployment need to license CALs matching their actual device or user count to remain compliant with Microsoft's licensing terms - this pack is sized for a mid-size office or department rather than a very small business or a large enterprise site. Microsoft periodically audits licence compliance, so businesses should retain proof of purchase for CAL packs like this one as part of their software asset records.