Client Access License (CAL) Microsoft Windows Server 2025 — 1 User CAL OEM (EP2-25259)

Client Access License (CAL) Microsoft Windows Server 2025 — 1 User CAL OEM provides a single named-user license to access Windows Server 2025 services from multiple devices. This license permits one specific user to connect to server resources such as file shares, remote desktop services, centralized applications and directory services according to Microsoft licensing rules. Delivered as an OEM CAL, it is intended to cover a single person rather than a device, enabling flexible access across desktop, laptop and mobile devices used by that user.

Advantages

The user CAL model simplifies license management where employees require access from several endpoints by assigning rights to a named individual. It supports common Windows Server functions including file and print access, authentication via Active Directory, and access to server-hosted applications. As a single-user CAL, it reduces the need to count devices and can be more economical for mobile or remote staff who use multiple devices. Being an OEM license, it is provided in a manufacturer-specific format suitable for integration with existing Windows Server licensing environments.

Suitable for

• Small and medium businesses requiring per-user access to server resources
• Organizations with employees who work from multiple devices or remotely
• Environments using Active Directory, file sharing, or remote desktop services
• Companies aiming to standardize per-user licensing for compliance and auditing

Key specifications

• License type: Single named-user Client Access License (User CAL)
• Server compatibility: Microsoft Windows Server 2025
• Access scope: Allows one named user to connect from multiple devices
• Usage model: Per-user licensing for access to file, print, authentication and application services
• Delivery format: OEM license intended for integration into existing licensing setups

How to use

Assign the CAL to a single named user in your organization's licensing records and configure server access according to Microsoft’s licensing and deployment guidelines. Ensure the user identity is managed through your directory service (for example Active Directory) so that access rights are traceable. When deploying, verify compatibility with your Windows Server 2025 installation and apply any required activation or registration steps defined by your licensing agreement. Keep documentation of assignments for compliance and auditing purposes.

Usage recommendations

For organizations with staff who frequently switch between devices, the per-user CAL model typically offers clearer compliance tracking than per-device licensing. Review your current and projected number of users accessing server resources to determine the number of CALs required, and maintain accurate records of which user each CAL is assigned to.