Windows Server Licensing on a VPS: What You Actually Need to Own

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OS licence, CALs, RDS CALs, SQL Server: the full picture on Microsoft licensing for a Windows server, and on what By-Hoster does not supply.

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Renting a Windows VPS and owning a Microsoft licence are two separate things, and plenty of hosting providers would rather not say so. At By-Hoster it is written plainly: we install the system you pick at checkout — Windows Server 2025, Windows Server 2022 or Windows 11, at no extra cost — but we neither supply nor resell any licence. The right to use that system remains yours to acquire.

The most common confusion involves remote desktop. Windows Server allows 2 simultaneous administrative RDP sessions: that is an administration mode, not a multi-user usage licence. As soon as several people connect to work inside an application, the framework changes and RDS CALs become necessary. SQL Server and your business software follow further rules of their own, also at your expense.

This guide explains that framework in plain language: what the OS licence covers, what CALs are, how RDS CALs are counted, the SQL Server case, the Windows 11 case and the steps to get compliant. It quotes no Microsoft prices, because they move and vary between resellers, and it is not legal advice: the authority remains Microsoft and a licensing reseller.

What a Windows Server licence is, and what it covers

A Windows Server licence is a right to use the operating system, sold by Microsoft, independent of the machine it runs on. When you order a Windows VPS from By-Hoster, you rent a virtual machine: vCores, RAM, NVMe storage, a dedicated IPv4 and bandwidth. We install the system you selected at checkout, at no extra cost, and hand you the keys. The right to use that system does not come from us.

The licence covers the system itself: the kernel, the included Windows roles (IIS, file server, DNS, Active Directory...) and the fact of running the machine. It does not automatically cover the right for several people to access it, nor the software you install afterwards. That is exactly where most misunderstandings start, and it is what the following sections are about.

  • What the OS licence covers: running Windows Server on the machine, enabling the included roles, administering the server.
  • What it does not cover: access by your users (CALs), application-facing remote desktop sessions (RDS CALs), SQL Server, and your business software.
  • What By-Hoster charges for: the server, the infrastructure, the dedicated IPv4, Anti-DDoS, snapshots and 24/7 human support — never a Microsoft licence.

OS licence versus CAL: two things people keep mixing up

A CAL (Client Access License) is a right of access. The shortest way to put it: the OS licence gives you the right to switch the server on, the CAL gives the right to connect to it. Microsoft sells both separately, and the CAL count is based on your actual users or devices, not on how powerful the machine is. A 4-vCore VPS and a 24-vCore VPS make no difference to the count.

Two families need separating, and they stack. Windows Server CALs cover basic access to the server. RDS CALs (Remote Desktop Services) sit on top when access happens through a remote desktop session used for work. In other words, an RDS CAL does not replace a Windows Server CAL: it comes in addition. The exact, current wording of those rules belongs to Microsoft, not to a hosting provider.

  • Windows Server CAL: the base access right, per user or per device.
  • RDS CAL: in addition, for remote desktop sessions used for application work.
  • Neither is supplied by By-Hoster: both are bought from Microsoft or a licensing reseller.
  • The count depends on your organisation: how many people, how many workstations, how they connect. Have a reseller validate it.

The two administrative RDP sessions: what they are, what they are not

Windows Server allows 2 simultaneous administrative RDP sessions. That mode exists for a precise reason: letting an administrator — plus a colleague lending a hand — connect to configure, troubleshoot and maintain the server. It is designed for administering the machine, not for putting users to work. That nuance is the one half of all support tickets have never heard.

The wrong reading is always the same: "I am allowed two simultaneous users, so my two-person practice is compliant." No. As soon as remote desktop is used to let people work inside an application — accounting software, an ERP, a data-entry station — you have left administration for application use, and the Remote Desktop Services (RDS) role with its RDS CALs becomes necessary. Something working technically never means it is licensed.

  • 2 administrative sessions: configuration, troubleshooting, maintenance, applying a patch.
  • Multi-user application access: the RDS role plus RDS CALs, whatever the headcount.
  • It is not a user quota: two administrative sessions are not two usage licences.
  • The rescue VNC console included by By-Hoster is there when RDP stops answering — it changes nothing about the licensing framework.

RDS CALs per user or per device: how to decide

RDS CALs come in two modes, and the right pick depends purely on the shape of your team. A per-user RDS CAL follows the person: they can connect from their desktop, their laptop or a tablet, and it remains one licence. A per-device RDS CAL follows the machine: the workstation is licensed, and several people may use it in turn.

The decision rule fits in one sentence. If there are more people than workstations — a workshop, a front desk, teams rotating on shared machines — per device works out cheaper. If there are more workstations than people — remote work, travelling staff, a desktop at the office and a laptop at home — per user is the answer. The mode is declared on the RDS licensing server and it shapes your whole count: decide it before buying, with a reseller.

  • Per user: one person, several devices. The remote-work and mobile-team mode.
  • Per device: one workstation, several people. The shared-desk and shift-rotation mode.
  • CALs are activated on an RDS licensing server, following the procedure Microsoft documents.
  • They do not move freely between modes: the choice is made upfront, not after the fact.

The SQL Server case: one more licence, never included

Many Windows servers carry a database, usually because a business application demands one. SQL Server requires its own licence, separate from the OS licence and separate from CALs. SQL Server Express is free from Microsoft and is enough for plenty of small deployments, provided you accept its very real limits. Standard and Enterprise are paid editions, priced by Microsoft or a reseller.

Those limits do not depend on the VPS you rent: they live in the engine. A server with 64 GB of RAM will not push Express past its ceilings. On sizing, our official rule sets 8 GB of RAM as the floor as soon as SQL Server Express is involved, against 4 GB for light RDP and office use alone. Our SQL Server VPS page details what the engine actually demands.

  • 10 GB maximum per database on Express: the wall production workloads hit first.
  • 1 socket or 4 cores used by the engine, whichever is smaller: extra vCores go to the OS and applications.
  • 1.4 GB of RAM for the engine, regardless of how much memory the machine has.
  • Standard and Enterprise lift those limits, but are paid editions to acquire separately.

The Windows 11 case: a client system, with client-system limits

Windows 11 is among the systems offered at checkout, at no extra cost, alongside Windows Server 2025 and 2022. Its licence follows the same rule as the others: it is your responsibility. Its lifecycle differs though: support is tied to the installed release, roughly 24 months per release, with no single fixed date — whereas Windows Server 2025 has mainstream support to 13 November 2029 and security servicing to 14 November 2034.

The important point is what it fundamentally is. Windows 11 is a client system, not designed to host a multi-user service. It does not take the Windows Server Remote Desktop role and does not turn into a shared RDP server, whatever workarounds circulate online. It does make sense for an individual remote workstation: software that requires a client OS, a trading environment, a test machine. For multi-user RDP, use Windows Server and RDS CALs.

Getting compliant, step by step

There is nothing mysterious about the process: describe your usage honestly, then have it priced by someone who does this for a living. Here is the order we recommend — and you can work through it before even ordering the server.

  1. List who actually accesses the server, and from which devices. A two-column table is enough: people on one side, workstations on the other.
  2. Qualify each access: administering the machine, or working inside an application? That answer drives everything else.
  3. Pick the system: Windows Server 2025, Windows Server 2022 or Windows 11, depending on what your software vendor certifies. Chosen at checkout, changed later by reinstalling.
  4. Budget the OS licence, to be acquired from Microsoft or a reseller.
  5. Count your Windows Server CALs based on the users or devices involved.
  6. If the usage is application-facing, add RDS CALs and settle the per-user versus per-device question.
  7. Add SQL Server if a database runs on the machine: Express free within its limits, Standard or Enterprise otherwise.
  8. Do not forget your business software (Sage, EBP, Cegid, Ciel...): those licences remain yours and follow their vendors' own rules.
  9. Have the whole list validated by a Microsoft licensing reseller, then keep invoices and proofs of purchase wherever you keep your credentials.

What By-Hoster supplies — and what it does not

What we supply is specific. A VPS delivered in 10 minutes, with your chosen system installed at no extra cost, full administrator access, RDP access optimised up to 60 FPS, a rescue VNC console, NVMe storage, a dedicated IPv4, Anti-DDoS, snapshots, reinstallation from the client area and 24/7 human support by ticket, Discord and phone. All of it with no commitment, with a 48-hour money-back guarantee, from our single datacenter DC-FR_NA(01) in Nouvelle-Aquitaine, France.

What we do not supply is just as specific: no Microsoft licence at all. Not the OS, not CALs, not RDS CALs, not SQL Server, not your business software. Some providers rent Microsoft licences to customers through the SPLA programme (Services Provider License Agreement) and rebill them inside the subscription: By-Hoster does not. We would rather quote a price that hides nothing and let you buy your licences where licences are sold, than let anyone assume it is all included.

Then there is the server that will carry all of it. The Windows range has four configurations, monthly prices including VAT, with -10% on annual commitment. Our sizing rule: 4 GB of RAM minimum for light use — RDP and office work, a single user — and 8 GB as soon as you add business software, SQL Server Express or several simultaneous users. Every plan already starts at 8 GB.

Worth stating clearly: this guide explains a framework, it does not engage the association's liability and is neither legal advice nor a compliance audit. Microsoft licensing terms, their versions and their prices change and vary between resellers — which is precisely why you will find no Microsoft price on this page. For your own situation, the authority remains Microsoft and a licensing reseller. Our team, for its part, will gladly answer about the server, its sizing and its operation.

  • Windows - Core: 4 vCores, 8 GB RAM, 50 GB SSD, 500 Mbps — €8/month incl. VAT.
  • Windows - Plus: 8 vCores, 16 GB RAM, 200 GB SSD, 500 Mbps — €13/month incl. VAT, the most popular configuration.
  • Windows - Max: 16 vCores, 32 GB RAM, 500 GB SSD, 500 Mbps — €26/month incl. VAT.
  • Windows - Titan: 24 vCores, 64 GB RAM, 800 GB SSD, 1000 Mbps — €49.99/month incl. VAT.

Frequently asked questions

Yes, and it is your responsibility. By-Hoster installs the system you choose at checkout — Windows Server 2025, Windows Server 2022 or Windows 11, at no extra cost — but neither supplies nor resells any Microsoft licence. You must hold a valid one for your usage. Our price covers the server, the infrastructure, the dedicated IPv4, Anti-DDoS, snapshots and 24/7 human support. For licence pricing, talk to Microsoft or a reseller.

No. The €8/month incl. VAT of Windows - Core (4 vCores, 8 GB RAM, 50 GB SSD, 500 Mbps) covers the server and its operation, not the Microsoft licence. The rest of the range follows the same rule: Windows - Plus at €13/month (8 vCores, 16 GB, 200 GB), Windows - Max at €26/month (16 vCores, 32 GB, 500 GB) and Windows - Titan at €49.99/month (24 vCores, 64 GB, 800 GB, 1000 Mbps). Annual commitment gives -10%.

2 simultaneous administrative RDP sessions. They exist to administer the machine: configuration, troubleshooting, maintenance. That is not a multi-user usage licence. As soon as several people connect to work inside an application, you need the Remote Desktop Services (RDS) role and Microsoft RDS CALs. The server technically accepting a connection never means the connection is licensed: holding the rights that match your real usage is on you.

An RDS CAL (Remote Desktop Services Client Access License) is a right of access through a remote desktop session, sold by Microsoft. It adds to the OS licence and the base Windows Server CAL rather than replacing them. It is counted on your real users or devices, not on how powerful the VPS is — a 4-vCore server and a 24-vCore server make no difference. By-Hoster supplies none of them.

The rule is a simple comparison. More people than workstations (shared desks, shift rotation): per device works out cheaper, each workstation being licensed once for everyone using it. More workstations than people (remote work, a desktop and a laptop, travelling staff): per user is the answer, the licence following the person across all their devices. The mode is declared on the RDS licensing server and should be settled before purchase, with a reseller.

No. SQL Server requires its own licence, separate from the OS and from CALs. Express is free from Microsoft, with three very real limits: 10 GB maximum per database, 1 socket or 4 cores used by the engine, and 1.4 GB of RAM whatever the machine holds. Standard and Enterprise are paid. Those ceilings come from the engine, not the VPS: renting 64 GB changes nothing.

No. Windows 11 is a client system: it is not designed to host a multi-user service and does not take the Windows Server Remote Desktop role. We offer it at checkout at no extra cost, licence at your expense, and it fits an individual remote workstation perfectly — software that requires a client OS, a test machine, a trading environment. For multi-user RDP, take Windows Server and RDS CALs.

No. Some providers rent licences to their customers through Microsoft's SPLA programme (Services Provider License Agreement) and rebill them inside the monthly subscription. By-Hoster does not: we install the system and operate the server, nothing more. We would rather display a price that hides nothing and let you acquire your licences from Microsoft or a reseller, than let anyone believe everything is bundled into the subscription.

Our official rule: 4 GB of RAM minimum for light use — RDP and office work, a single user — and 8 GB as soon as you add business software, SQL Server Express or several simultaneous users. Every Windows plan already starts at 8 GB. For several application-facing RDP sessions, Windows - Plus and its 16 GB (€13/month incl. VAT) is a more comfortable base: every open session consumes memory, and the operating system wants its share too.

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