Windows Server 2025.26100.1742-oemret-x64fre-en... Jun 2026

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This is the most specific technical data point: Windows Server 2025.26100.1742-OEMRET-x64FRE-en...

There are a few key dates and nomenclature points to be aware of for this release. The screen flickered

: Indicates the integrated licensing media configured for either OEM (Original Equipment Manufacturer) or Retail deployment channels. The OS is tightly integrated with , allowing

Enterprise deployment utilizing centralized (Key Management Service) or MAK keys. EVAL Microsoft Evaluation Center

The primary focus is bridging on-premises infrastructure with the cloud. It is the most Azure-integrated version yet. The OS is tightly integrated with , allowing you to manage on-premises, multi-cloud, and edge servers from a single control plane in Azure. It also includes hotpatching capabilities, which allows you to apply security updates without a reboot, minimizing downtime and simplifying maintenance.

If you are looking for why this version is "useful," here are the standout improvements in the 2025 generation: Hotpatching for Everyone