Microsoft Client Access Licenses (CALs) are a fundamental requirement for any organisation running Windows Server, SQL Server, Exchange Server, or Remote Desktop Services. Whether you need User CALs for mobile workforces or Device CALs for shared workstations, Lizensa provides genuine digital CAL licenses with instant delivery, full VAT invoicing, and expert guidance on Microsoft licensing compliance.
−12%Microsoft Windows Server 2022 Device CAL for one device. Digital delivery with activation guidance and EU support from Lizensa.
−14%Windows Server 2022 CAL 1 user cal digital license for compliant EU deployments. Includes delivery, activation guidance, and Lizensa support.
−14%Digital license for 10 user CALs for Windows Server 2022. Includes activation guidance and Lizensa support.
−14%Digital license for 100 user CALs for Windows Server 2022. Includes activation guidance and Lizensa support.
−14%Buy a Windows Server 2022 CAL 25 user CAL digital license. EU delivery, activation guidance, and support included.
−12%Buy Windows Server 2022 CAL for 3 devices. Digital delivery, activation guidance, and EU support included.
−14%Digital license for 3 users to access Windows Server 2022. EU delivery, activation guidance, and Lizensa support included.
−12%Digital license for 5 device CALs, enabling legal access to Windows Server 2022. EU delivery, activation support included.
−14%Windows Server 2022 CAL for 5 users. Digital delivery, activation guidance, and EU support included.
−14%Microsoft Windows Server 2022 CAL for 50 users. Digital delivery, EU license, with activation support from Lizensa.
−12%Digital license for one device to access Windows Server 2025. Includes delivery and activation support.
−15%Windows Server 2025 device CAL for RDS access. Digital delivery, activation guidance included.
−15%Digital Microsoft Windows Server 2025 RDS User CAL license with EU delivery and activation support.
−14%Digital license for one user to access Windows Server 2025. Includes activation guidance and Lizensa support.
−12%Digital license for 10 device CALs for Windows Server 2025. EU delivery with activation guidance and support.
−15%10-device RDS CAL for Windows Server 2025, delivered digitally with activation guidance.
−15%Digital license for 10 user CALs for Windows Server 2025 RDS. EU delivery, activation support included.
−14%Digital 10-user CAL license for Windows Server 2025. Covers up to 10 users accessing server services. Includes activation guidance and EU support.
−12%Digital license for 100 device CALs for Windows Server 2025. Delivered via email with activation support.
−15%Microsoft Windows Server 2025 RDS Device CAL for 100 devices. Digital delivery with activation guidance and support from Lizensa.
−15%Digital license for 100 RDS User CALs for Windows Server 2025. Delivered via email with activation guidance. EU-based, compliant.
−14%Digital license for 100 user CALs for Windows Server 2025, with EU-compliant delivery and activation support.
−12%Microsoft Windows Server 2025 CAL for 25 devices, delivered digitally with activation support. Compliant licensing for EU businesses.
−15%Buy Windows Server 2025 CAL 25 rds device cal digital license for RDS access. EU delivery, activation guide included.
Lizensa의 모든 라이선스는 EU 소비자법에 따라 14일 이내 조건 없이 환불이 가능합니다. 당사는 공인된 유럽 유통 채널을 통해 조달하며, 모든 키는 배송 전에 검증됩니다. 활성화에 문제가 발생하면 지원팀이 1시간 이내에 귀하의 언어로 답변해 드립니다.
A Client Access License (CAL) is a license that grants a user or device the legal right to access Microsoft server software. Unlike the server license itself — which covers the server installation — CALs cover the users or devices connecting to that server. This two-part licensing model is the foundation of Microsoft's on-premises server licensing and applies to Windows Server, SQL Server, Exchange Server, SharePoint Server, and Remote Desktop Services.
Every user or device that directly or indirectly accesses Microsoft server software needs a CAL. Indirect access includes scenarios like an employee using a web application that queries a SQL Server database on the back end, or a point-of-sale terminal that authenticates against a Windows Server domain controller. Microsoft audits enforce CAL compliance, and under-licensing can lead to significant financial penalties.
Windows Server CALs — Required for every user or device accessing a Windows Server. This includes basic network services like file sharing, printing, DHCP, DNS, and Active Directory authentication. Windows Server CALs are separate from the Windows Server operating system license and must be purchased for each user or device.
RDS CALs (Remote Desktop Services CALs) — An additional CAL required on top of the Windows Server CAL when users remotely access a Windows Server desktop or individual applications. RDS CALs come in User and Device variants and are mandatory for any Remote Desktop Session Host or Virtual Desktop Infrastructure deployment.
SQL Server CALs — Required when SQL Server is licensed under the Server + CAL model (typically Standard edition for smaller deployments). Each user or device accessing the SQL Server needs a SQL CAL. For larger workloads, SQL Server can alternatively be licensed under the Per Core model, which does not require CALs.
Exchange Server CALs — Required for each user or device accessing an on-premises Exchange Server. Exchange CALs come in Standard and Enterprise tiers: Standard CAL covers email, calendar, and shared mailbox access, while Enterprise CAL adds advanced features like unified messaging, in-place hold, and data loss prevention.
CAL Suites — Microsoft bundles Core CAL Suite and Enterprise CAL Suite for organisations that need CALs across multiple server products. The Core CAL Suite includes Windows Server CAL, Exchange Server Standard CAL, SharePoint Server Standard CAL, and Skype for Business Server Standard CAL. The Enterprise CAL Suite adds Exchange Enterprise CAL, SharePoint Enterprise CAL, Skype for Business Enterprise CAL, and advanced compliance features.
User CAL vs Device CAL — A User CAL licenses a specific user to access the server from any device (desktop, laptop, phone, tablet). This is ideal for mobile workforces and organisations where employees use multiple devices. A Device CAL licenses a specific device to be used by any number of users. This is more cost-effective for shift-worker scenarios, shared workstations, or environments like call centres where multiple employees share the same computer throughout the day.
Server + CAL vs Per Core — For SQL Server, organisations with fewer users accessing a database server may find the Server + CAL model more economical. For internet-facing or high-volume applications where the number of users is unknown or very large, the Per Core licensing model is the better choice. Windows Server always uses the Server + CAL model (the server license is core-based, but CALs are always required).
RDS CAL requirements — If users will access a full Windows desktop remotely (Remote Desktop Session Host) or individual applications published via RemoteApp, RDS CALs are mandatory in addition to Windows Server CALs. This applies regardless of the remote desktop protocol or thin client used.
Microsoft CAL licensing is enforced through periodic audits, including the Microsoft Software Asset Management (SAM) review program. Common compliance gaps include: forgetting that external contractors and partners need CALs; overlooking indirect access scenarios (middleware, web servers querying a SQL back end); assuming device CALs for BYOD scenarios are sufficient when employees use personal devices to access corporate servers; and failing to track CAL assignments across virtualised environments.
Lizensa recommends maintaining a CAL inventory spreadsheet, conducting annual internal license reconciliations, and consulting Microsoft licensing specialists when planning new server deployments. Each CAL purchase from Lizensa includes full documentation suitable for audit trails.
