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

corresponds to a specific update for Windows 11 (KB5034441 equivalent), not a server release. If applied to a server ISO, it indicates a hybrid or modified image.

Windows Server 2025 introduces several major infrastructure and security improvements over previous versions: Windows Server 2025.26100.1742-OEMRET-x64FRE-en...