Windows Server 2022 RDS Device CAL at a glance
An RDS Device CAL is the client access licence Microsoft requires before an endpoint may open a remote session on a server running the Remote Desktop Session Host role. It belongs to the Windows Server 2022 licensing family and is added on top of the regular Windows Server CAL, which covers basic access to the server itself. Because the licence is tied to the endpoint rather than to a person, whoever sits at a licensed terminal is covered for the session.
Microsoft offers two RDS CAL types, and this edition is the per-device variant. After the CALs are installed on an RD Licensing server, they are issued to connecting PCs, thin clients or kiosks and tracked there automatically. The job is narrow but essential: keeping a session-based desktop, RemoteApp or virtual desktop deployment correctly licensed so that endpoints continue to be admitted to remote sessions.
How it is used in everyday work
In daily operation the licence is barely visible. An administrator installs the CALs in the RD Licensing Manager once, sets the deployment's licensing mode to Per Device, and from then on the session host requests a licence whenever a new endpoint connects. A device first receives a temporary licence, which the licensing server converts into a permanent one on a later connection when a CAL is free in the pool. Reports in the licensing manager show which endpoints hold a CAL and how many remain unassigned.
The per-device model pays off wherever people outnumber machines. Typical examples are production halls, hospital wards, call centres and warehouses, where employees on rotating schedules share the same workstations to reach an ERP client, a patient record system or a business application published through RemoteApp. The licence follows the terminal, regardless of how many different employees log on to it during the day.
The functions that make a practical difference
Device CALs can be tracked by the licensing server whether or not the endpoint is a member of Active Directory, which makes them the practical choice for thin clients that are never joined to a domain. Licensing is also enforced rather than merely recorded: the server cannot hand out more Device CALs than are installed, so the environment cannot drift into accidental over-allocation the way a per-user setup can.
When hardware is retired, an administrator can revoke up to 20 percent of the issued Device CALs and return them to the pool, which helps during hardware refresh projects. Version compatibility works downward, so CALs for the 2022 release also admit connections to session hosts running Windows Server 2019 and 2016. A mixed server estate can therefore be licensed with a single purchase.
Choosing the right edition
The direct alternative is the RDS User CAL for the same server release. A User CAL is assigned to a person in Active Directory and covers that person regardless of which endpoint they use, which suits staff who switch between a laptop, a home PC and a tablet. The Device CAL suits the opposite pattern of few endpoints and many changing users. For customers or partners outside the organisation, Microsoft offers the RDS External Connector as a separate licence. Where session hosts already run Windows Server 2025, the newer 2025 RDS CALs are required, because licences for an older release cannot admit connections to a newer one.
Practical limits worth knowing before you buy
This licence does not replace the base Windows Server CAL; Remote Desktop access needs both. It is not needed for purely administrative access, because Windows Server permits two simultaneous admin sessions without an RDS CAL. The CALs must be installed on an RD Licensing server running Windows Server 2022 or later, so a licensing server on 2019 or 2016 cannot accept them. Device CALs are also a poor fit where employees roam across many personal devices, since every endpoint would then need its own licence.
Common questions before ordering
Can Device CALs and User CALs be combined?
Yes, one licensing server can hold both types side by side. Each session host is configured for one licensing mode at a time, so it helps to plan which hosts serve shared terminals and which serve individual users.
Do these CALs work with Windows Server 2019 session hosts?
Yes. RDS CALs are backward compatible, so licences for the 2022 release cover hosts running 2022, 2019 or 2016.
Are RDS CALs needed for Azure Virtual Desktop?
When Azure Virtual Desktop session hosts run Windows Server, Microsoft requires an RDS CAL for each connecting user or device, just as on-premises. This edition can be used there as long as the hosts run Windows Server 2022 or an earlier release.
Ordering Windows Server 2022 RDS Device CAL at Keys.discount
Every order is processed automatically, so you normally have everything you need within a few minutes of paying.
Delivery: Your product key and the official download link arrive by email.
Activation guarantee: If activation fails, we replace the key.
Sourcing: Licences come from audited distribution channels and are documented.
Setup help: Written step-by-step instructions accompany every delivery.
Support: Our team answers by chat, email and phone in several languages.
