What is a Windows Server 2019 RDS Device CAL?

An RDS Device CAL is a Remote Desktop Services access licence that authorises a specific device – such as a PC, thin client, terminal or workstation – to establish RDS sessions on Windows Server 2019. The principle is the opposite to that of a User CAL: instead of tracking the user, the system tracks the device. Anyone connecting to the server from that terminal is automatically covered, with no limit on the number of people. It is the most efficient model in environments where multiple users take turns using the same physical workstations.

What is the difference between an RDS Device CAL and an RDS User CAL for Windows Server 2019?

Feature RDS Device CAL RDS User CAL Authorises A specific device A named user Users per licence Unlimited One Devices per licence One Unlimited Assignment period 52–89 days (then automatically released) Permanent named assignment Optimal scenario Shifts, shared terminals, kiosks Users with multiple personal devices

Why does the Device CAL have an allocation period of 52–89 days?

The RDS licence server automatically assigns a Device CAL to the device upon its first connection. That device ‘retains’ the licence for a period ranging from 52 to 89 days: even if no new connections are made in the meantime, the CAL is not released before the expiry date. This mechanism is managed autonomously by the licence server and serves to ensure stability in licence assignment for environments with frequent device turnover. At the end of the period, the licence becomes available in the pool again without any manual intervention.

Do 2019 RDS Device CALs also cover sessions on earlier versions of Windows Server?

Yes. For backwards compatibility, an RDS Device CAL for Windows Server 2019 authorises RDS sessions even on servers running earlier versions of the operating system, such as Windows Server 2016 and 2012. The reverse is not true: CALs issued for earlier versions do not cover access to Windows Server 2019.

Do you need to activate the licence server before registering the CALs?

Yes, this is a mandatory prerequisite. The Remote Desktop Licensing Server must be activated via the Licence Manager, either online or by telephone through Microsoft, before any CALs can be registered. Without this activation, the licence installation wizard will not complete the process. Windows Server 2019 includes a 120-day grace period during which RDS connections will work even without registered CALs, which is useful for completing the initial configuration.

When should you NOT choose the Windows Server 2019 RDS Device CAL?

When users work remotely and connect to the RDS server from different devices – such as company laptops, desktop PCs or tablets – the RDS User CAL covers all of that user’s devices with a single licence, making it more cost-effective than licensing each individual machine. If the environment does not have the RDS role enabled and connections are only to shared resources such as folders or printers, the required CALs are standard access CALs for Windows Server services, not RDS CALs. Finally, if the server in use is Windows Server 2022, CALs for the corresponding version are required to ensure proper coverage.

Microsoft Windows Server 2019 RDS DEVICE CAL

Microsoft Windows Server 2019 RDS DEVICE CAL - Product Key

Microsoft Windows Server 2019 RDS DEVICE CAL - Product Key

Name: Microsoft Windows Server 2019 RDS DEVICE CAL - Product Key
Brand: Microsoft
SKU: MWS-2019-RDSDC
Price: 106.57 USD
Availability: InStock

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Your Windows Server 2019 RDS DEVICE CAL license bundle
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Windows Server 2019 RDS Device CAL system requirements

Requirement	Details
Compatible server	Windows Server 2019 with Remote Desktop Services role enabled
Licence type	RDS Device CAL: one specific device, unlimited users
Alternative	RDS User CAL: one named user, unlimited devices
RDS licence server	Mandatory: same RDS server or dedicated host within the infrastructure
Licence server activation	Prerequisite prior to CAL registration (online or by telephone)
Device assignment period	52–89 days before the CAL is automatically issued
Supported client devices	Windows, macOS, Linux, iOS, Android with a compatible RDP or RemoteApp client
Version compatibility	RDS Device CAL 2019 provides backward compatibility for RDS sessions on earlier versions
Support status	Windows Server 2019 is under extended support until 9 January 2029

Windows Server 2019 RDS Device CAL: the licence that is tied to the device, not the user

An RDS Device CAL for Windows Server 2019 is not a package to be run on the client terminal: it is the licence document that enables a specific physical or virtual device to initiate Remote Desktop Services sessions on Windows Server 2019, allowing any user connecting from that machine to access the service freely. After purchase from Mr Key Shop, the product key is sent by email along with the relevant documentation. No action is required on the client: all CAL management takes place on the RDS licence server via the dedicated console.

RDS Device CAL registration on Windows Server 2019: licence server and automatic assignment

The prerequisite is to have the Remote Desktop Services role enabled and an operational RDS licence server, which can be installed on the same host providing the services or on a separate machine within the same infrastructure. The licence server must be activated before registering the CALs, either via Microsoft’s online or telephone procedure. Once activated, the server automatically assigns a Device CAL to every device connecting for the first time via an RDS session, drawing from the pool of registered licences. The CAL remains linked to that device for a period of 52–89 days before it can be released and reallocated to other endpoints.

RDS Device CAL installation: wizard and licence pool update

Open the Remote Desktop Licence Manager on the licence server, start the licence installation process and select the programme type corresponding to your purchase. Enter the product key received from Mr Key Shop and confirm the number of CALs to be registered: the wizard completes the registration and updates the counter for authorised devices in real time. File the code in the organisation’s licence compliance records alongside the purchase record: in the event of a licence server replacement, RDS migration or Microsoft audit, this constitutes official proof of coverage.

Frequently Asked Questions about Microsoft Windows Server 2019 RDS Device CAL

What is a Windows Server 2019 RDS Device CAL?
An RDS Device CAL is a Remote Desktop Services access licence that authorises a specific device – such as a PC, thin client, terminal or workstation – to establish RDS sessions on Windows Server 2019. The principle is the opposite to that of a User CAL: instead of tracking the user, the system tracks the device. Anyone connecting to the server from that terminal is automatically covered, with no limit on the number of people. It is the most efficient model in environments where multiple users take turns using the same physical workstations.

What is the difference between an RDS Device CAL and an RDS User CAL for Windows Server 2019?

Feature	RDS Device CAL	RDS User CAL
Authorises	A specific device	A named user
Users per licence	Unlimited	One
Devices per licence	One	Unlimited
Assignment period	52–89 days (then automatically released)	Permanent named assignment
Optimal scenario	Shifts, shared terminals, kiosks	Users with multiple personal devices

Why does the Device CAL have an allocation period of 52–89 days?
The RDS licence server automatically assigns a Device CAL to the device upon its first connection. That device ‘retains’ the licence for a period ranging from 52 to 89 days: even if no new connections are made in the meantime, the CAL is not released before the expiry date. This mechanism is managed autonomously by the licence server and serves to ensure stability in licence assignment for environments with frequent device turnover. At the end of the period, the licence becomes available in the pool again without any manual intervention.
Do 2019 RDS Device CALs also cover sessions on earlier versions of Windows Server?
Yes. For backwards compatibility, an RDS Device CAL for Windows Server 2019 authorises RDS sessions even on servers running earlier versions of the operating system, such as Windows Server 2016 and 2012. The reverse is not true: CALs issued for earlier versions do not cover access to Windows Server 2019.
Do you need to activate the licence server before registering the CALs?
Yes, this is a mandatory prerequisite. The Remote Desktop Licensing Server must be activated via the Licence Manager, either online or by telephone through Microsoft, before any CALs can be registered. Without this activation, the licence installation wizard will not complete the process. Windows Server 2019 includes a 120-day grace period during which RDS connections will work even without registered CALs, which is useful for completing the initial configuration.
When should you NOT choose the Windows Server 2019 RDS Device CAL?
When users work remotely and connect to the RDS server from different devices – such as company laptops, desktop PCs or tablets – the RDS User CAL covers all of that user’s devices with a single licence, making it more cost-effective than licensing each individual machine. If the environment does not have the RDS role enabled and connections are only to shared resources such as folders or printers, the required CALs are standard access CALs for Windows Server services, not RDS CALs. Finally, if the server in use is Windows Server 2022, CALs for the corresponding version are required to ensure proper coverage.