Microsoft to Charge for Windows Server 2025 Hotpatching Starting July
Microsoft has announced that its hotpatching feature for Windows Server 2025 will require a paid subscription starting July 1, 2025. This service allows administrators to apply security patches without rebooting the system, improving uptime and reducing disruptions. Previously offered for free during the preview phase since 2024, hotpatching will now cost $1.50 USD per CPU core per month. Microsoft advises current preview users to disenroll by June 30 to avoid automatic subscription charges.
Hotpatching, originally exclusive to Azure-based environments, will be extended to non-Azure servers through Azure Arc connectivity. To use the service in on-premises or multi-cloud scenarios, organizations will need Windows Server 2025 (Standard or Datacenter), an Azure Arc connection, and a subscription. Activation involves configuring servers in the Azure Portal via Azure Update Manager.
This technology has existed since 2022 for Windows Server 2022 Datacenter: Azure Edition and has been gradually expanded. It does not cover all updates—reboots are still required for certain patches, such as .NET and non-security updates. Microsoft has also brought hotpatching to Windows 11 Enterprise 24H2 and Windows 365 for business users as of April 2025.
Community feedback has been mixed, with some users criticizing the monetization of a previously free feature.