Microsoft Windows Server 2025 — 1 Device CAL

Windows Server 2025 — 1 Device CAL (Client Access License) is an access license that authorizes one named device to connect to any number of Windows Server 2025 servers within your organization. A Device CAL is assigned to a specific device (desktop PC, laptop, terminal) — regardless of how many people use it, only one CAL license is required. At Licensier.com, you receive an original Microsoft license with instant delivery by email and 24/7 technical support.

Key features

• Access for 1 named device — the license is assigned to a specific PC, laptop, or terminal
• Unlimited number of users — any number of people can use the licensed device (for example, shift work)
• Access to all servers — one Device CAL allows the device to connect to any number of Windows Server 2025 servers within the organization
• Backward compatibility — a Windows Server 2025 Device CAL also covers access to earlier versions (2022, 2019, 2016)
• Perpetual license — one-time purchase, no expiry date, no subscription fees
• Legally required — every device or user connecting to Windows Server must have a valid CAL license
• Transferable — the license can be reassigned to another device 90 days after the last assignment or in the event of hardware failure
• Audit compliance — an original Microsoft license meets SAM/SPLA licensing audit requirements

Who is it for?

A Device CAL is the best choice when multiple employees use one device. Typical scenarios include shared shift-work computers in factories and warehouses, reception workstations in hotels and clinics, information kiosks, POS terminals in retail stores, and computer labs in schools and universities. In each of these cases, one device is shared by multiple users — instead of buying a separate User CAL for each person, one Device CAL per device is sufficient. A Device CAL is also the more cost-effective option when the number of devices is lower than the number of users. However, if one employee uses multiple devices (PC, laptop, tablet), a User CAL will be the cheaper solution.

System requirements

• Server: installed and licensed Windows Server 2025 (Standard or Datacenter) with an active server license
• Server versions: the 2025 CAL also covers access to Windows Server 2022, 2019, and 2016
• Client device: any device capable of network connectivity — PC, laptop, terminal, kiosk, tablet
• Client operating system: any (Windows, macOS, Linux, Chrome OS) — the CAL does not restrict the device platform

What do you receive?

After purchase, you receive an original Microsoft Device CAL license sent instantly to your email address — usually within 5 minutes of payment confirmation. Like a User CAL, a Device CAL is a licensing entitlement (legal right), not a product key that requires activation in the system. The license should be assigned to a specific device in your organization’s internal licensing records. Together with the license, you receive proof of purchase and instructions for properly documenting CAL assignments for Microsoft audit purposes. Buy with confidence from Licensier and receive a VAT invoice.

Frequently asked questions

Device CAL is assigned to a device — any number of people can use one licensed computer. User CAL is assigned to a person — one user can connect to the server from any number of devices. Choose a Device CAL when multiple people share one device (shift work, kiosks). Choose a User CAL when one person uses multiple devices (PC, laptop, phone).

Yes. Microsoft allows mixing CAL types within one organization. For example, you can use User CALs for office employees working on laptops and tablets, and Device CALs for shared warehouse computers. The important point is that each user OR device must have the appropriate license assigned — you do not have to choose only one type exclusively.

No. A Device CAL is a legal entitlement, not a license key. It does not require entering a code or technical activation on the device or the server. You simply assign the license to a specific device in your organization’s internal license records and keep the proof of purchase in case of a Microsoft audit.

Yes. The Windows Server 2025 Device CAL license provides backward compatibility and also grants access to Windows Server 2022, 2019, and 2016. Please note: it does not work the other way around — an older CAL (for example, 2019 or 2022) does not grant access to Windows Server 2025. If you upgrade your server to the 2025 version, you must also upgrade your CALs.

Yes, with limitations. A Device CAL can be reassigned to another device after 90 days from the last assignment. The exception is permanent hardware failure — in that case, the license may be transferred immediately to a replacement device. CALs may not be transferred temporarily or on a rotating basis to reduce the number of required licenses.