Exchange Server 2016 Standard Device CAL

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Manufacturer	Microsoft
Manufacturer number	381‐04396
Product number	CAL2016EX_STD_DEV

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Exchange Server 2016 Standard Device CAL – Device-based access licensing for shared-device environments

With the Microsoft Exchange Server 2016 Standard Device CAL (Client Access Licence), you acquire access rights for a specific end device to your organisation’s Exchange Server infrastructure. This licensing model is the cost-effective choice for scenarios where several employees use the same device – for example, in shift-based operations, at production terminals, in service centres or at shared workstations. It provides a clear allocation of access rights at the hardware level and ensures that all users can utilise the email, calendar and communication features of Exchange Server 2016 in a legally compliant manner.

Features

Device-bound access authorisation: Allows a specifically assigned end device to access an unlimited number of Exchange Server instances within the organisation, regardless of which employee is using the device.
Full functional access under the standard server licence: Enables the use of core Exchange functions via the licensed device, including email, calendar, contacts and task management, as well as mailbox access via Outlook, Outlook on the Web (OWA) and mobile devices (Exchange ActiveSync).
Cross-platform access: Supports access via Windows PCs, mobile devices and browser-based clients alike.
Broad application compatibility: Suitable for devices that access mailboxes and calendars via Outlook clients, web browsers or mobile email apps.
Audit security: Helps ensure proper licensing and protects against under-licensing during audits.

Advantages

Cost-effectiveness with shared device usage: Save on licence costs when several employees (e.g. working in shifts) use the same device to access email and calendar services.
Easy scalability: New end devices can be integrated quickly and easily into the existing infrastructure by purchasing additional Device CALs.
Unlimited number of servers: A licensed device may access any number of Exchange Server instances within the organisation, provided these are correctly licensed.
Allocation via hardware inventory: The licence is tied to a uniquely identifiable device, which facilitates traceability in stable device fleets.
Investment protection for existing infrastructure: Thanks to the downgrade right, the CAL can also be used in environments still running an older version of Exchange and remains usable following a subsequent migration to Exchange Server 2016.

Special Features

Device focus: Ideal for organisations where the number of end devices is lower than the number of users accessing the system (e.g. shift work, shared workstations, till or terminal systems).
Version compatibility: The Exchange Server 2016 Standard CAL grants access to Exchange Server 2016 and – via the downgrade right – to older versions (e.g. 2013, 2010 and earlier). Access to newer versions such as Exchange Server 2019 requires a corresponding 2019 CAL.
Mailbox and calendar access: Enables users on the licensed device to make full use of personal mailboxes, shared calendars, distribution lists and public folders.
Extension option: If required, the Standard CAL can be extended with the Enterprise CAL add-on to enable features such as In-Place Hold, eDiscovery, Data Loss Prevention (DLP) or Information Rights Management (IRM).

Areas of application

Shift and multi-user operation: Production, logistics or care environments in which several staff members take turns using the same device.
Cash register and terminal systems: POS systems, self-service terminals or information desks with rotating staff, which access central communication services.
Call centres & service desks: Workstations staffed by different agents according to a shift rota and accessing shared inboxes or service mailboxes.
Scenarios with a high user density per device: Environments in which the number of staff significantly exceeds the number of computers and mobile devices.

Requirements

Licensing model: Server + CAL model. In addition to the Device CAL, a separate server licence must be purchased for each running instance of the Exchange Server. The Standard CAL covers the basic mailbox and communication functions; the Enterprise CAL add-on is also required for advanced compliance and security features.
Allocation: The CAL is permanently allocated to a physical end device. Reallocation to another device is generally permitted after 90 days at the earliest (exceptions apply, for example, in the event of a permanent hardware fault or the decommissioning of the device).
Multiplexing note: If end devices access the Exchange Server indirectly via middleware, web front-ends, pooling mechanisms or third-party applications, a separate CAL is still required for each of these devices. Multiplexing does not reduce the CAL requirement.
Device replacement & hardware lifecycle: In the event of repairs, replacements or decommissioning, the CAL allocation must be documented and, where necessary, transferred. For device fleets that fluctuate significantly or are very large, user-CAL-based licensing may be more cost-effective and easier to manage in terms of compliance.
Legal Obligations: The current Microsoft Product Terms (formerly Product Use Rights) are always decisive for legally compliant licensing. This product description is intended as a guide and does not replace individual licensing advice.

Conclusion

The Exchange Server 2016 Standard Device CAL is a cost-effective solution for organisations wishing to licence their email and communications infrastructure on a per-device basis. It offers legal certainty and clear hardware allocation – particularly when several employees take turns working on the same end devices. If the number of your devices is significantly lower than the number of your users, the Device CAL provides you with an efficient way to use Exchange Server 2016 without having to maintain a separate licence for each individual employee.

Note on the support lifecycle
Mainstream support for Exchange Server 2016 ended on 13 October 2020; extended support ran until 14 October 2025 and has therefore now expired. For new deployments, Microsoft recommends migrating to the Exchange Server Subscription Edition (SE) or switching to Exchange Online. The Device CAL remains a sensible choice, however, for existing environments with a planned migration or for hybrid transition scenarios.

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