PLEASE NOTE: CAL licences do not require technical activation or activation software. The licences are supplied with a serial number to provide evidence, in the event of an audit by Microsoft, that the CALs for the devices or users in use are legitimate and comply with the Microsoft Services Agreement. Microsoft SQL Server 2025 Standard CAL(Client Access Licence) is the essential licence for users or devices accessing the database server, ensuring Microsoft compliance and scalability for SMEs and corporate departments. User and Device CAL Differences User CALs authorise a specific user to connect from any device, perfect for mobile, remote or multiple personal PC employees, offering maximum flexibility in hybrid scenarios.Device CALs, on the other hand, bind the licence to a single shared device, allowing multi-user access from fixed locations such as terminal servers, call centres or labs, with optimised costs for highly shared environments. Shared functionality Both support full acce