Client access license definition
A client access license is a software license that permits a client to access server software services.
See also: access control entry, access control system, discretionary access control, network access control, mandatory access control, risk-based access control, access management
Types of client access license
- User CALs. A user can access the server from any number of devices. This option is ideal when users access the server from multiple devices, such as a work computer, personal laptop, smartphone, or tablet.
- Device CALs. Many users can access the server from the same licensed device. This option is suitable in scenarios where multiple users share the same device, like a computer in a training room or a workstation in a factory.
Organizations often use a combination of both types to optimize their workflow based on their particular mix of users and devices.
Usage of CALs
Businesses that use server-based software applications are the most common users of CALs. For example:
- Windows Server environments
- Database servers like Microsoft SQL Server
- Email and communications servers like Microsoft Exchange or SharePoint
- Remote Desktop Services (RDS)
- Enterprise resource planning (ERP) or Customer relationship management (CRM) systems like Microsoft Dynamics
- File and print services
