Windows Server removed features

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3434 | Failover Clustering Cluster Sets |The Failover Clustering Cluster Sets feature is no longer in active feature development and is deprecated. |

3535 | Network Load Balancing (NLB) | NLB is no longer in active feature development and is deprecated. Consider using a Software Load Balancer (SLB) as an alternative. To learn more about SLB, see [What is Software Load Balancer (SLB) for SDN?](/azure/azure-local/concepts/software-load-balancer?context=/windows-server/context/windows-server-edge-networking) |

3636 | NTLM | [NTLMv1](/windows/win32/secauthn/microsoft-ntlm) is removed. LANMAN and NTLMv2 are no longer under active feature development and are deprecated. NTLMv2 will continue to work but will be removed from Windows Server in a future release. Replace calls to NTLM with calls to [Negotiate](/windows/win32/secauthn/microsoft-negotiate), which tries to authenticate with Kerberos and only fall back to NTLM when necessary. For more information, see [The evolution of Windows authentication](https://techcommunity.microsoft.com/t5/windows-it-pro-blog/the-evolution-of-windows-authentication/ba-p/3926848). |

37 −| Remote Mailslots | Remote Mailslots are deprecated. The Remote Mailslot protocol, which was initially introduced in MS DOS, is a dated and simple IPC method that is both unreliable and insecure. This protocol was first disabled by default in [Windows 11 Insider Preview Build](https://blogs.windows.com/windows-insider/2023/03/08/announcing-windows-11-insider-preview-build-25314/). For more information on Remote Mailslots, see [About Mailslots](/windows/win32/ipc/about-mailslots) and [[MS-MAIL]: Remote Mailslot Protocol](/openspecs/windows_protocols/ms-mail/8ea19aa4-6e5a-4aed-b628-0b5cd75a1ab9). |

37 +| Remote Mailslots | Remote Mailslots are deprecated. The Remote Mailslot protocol, which was initially introduced in MS DOS, is a dated and simple IPC method that is both unreliable and insecure. This protocol was first disabled by default in [Windows 11 Insider Preview Build 25314](https://blogs.windows.com/windows-insider/2023/03/08/announcing-windows-11-insider-preview-build-25314/). For more information on Remote Mailslots, see [About Mailslots](/windows/win32/ipc/about-mailslots) and [[MS-MAIL]: Remote Mailslot Protocol](/openspecs/windows_protocols/ms-mail/8ea19aa4-6e5a-4aed-b628-0b5cd75a1ab9). |

3838 | TLS 1.0 TLS 1.1 | TLS versions 1.0 and 1.1 are deprecated per internet standards and regulatory bodies due to security concerns mentioned in [RFC 8996](https://www.rfc-editor.org/rfc/rfc8996). These versions are disabled by default in Windows Server 2025. For more information on TLS deprecation, see [TLS 1.0 and TLS 1.1 deprecation in Windows](/windows/win32/secauthn/tls-10-11-deprecation-in-windows). |

3939 | WebDAV Redirector service | The WebDAV Redirector service is deprecated. The service isn't installed by default in Windows Server. For more information on the WebDAV Redirector service, see [WebDAV - Win32 apps](/windows/win32/webdav/webdav-portal). |

4040 | Windows Internal Database (WID) | WID is used by several roles, including AD FS, AD RMS, IPAM, RD Connection Broker, and WSUS. Consider using a free or full version of SQL Server for these roles. WID will be removed from Windows in a future release. To learn more, see [SQL Server editions](/sql/sql-server/editions-and-components-of-sql-server-2022). |

41 −| Windows Management Instrumentation Command-line (WMIC) | Beginning with Windows Server 2025, WMIC is available as a Feature on Demand (FOD). It can be added with the `DISM /Add-Capability` command. It will be removed from Windows in a future release. [PowerShell for WMI](/powershell/scripting/learn/ps101/07-working-with-wmi) replaces the WMIC tool. Use PowerShell or programmatically query WMI as a replacement for WMIC. To learn more about WMIC depreciation, see [WMI command line (WMIC) utility deprecation: Next steps](https://techcommunity.microsoft.com/t5/windows-it-pro-blog/wmi-command-line-wmic-utility-deprecation-next-steps/ba-p/4039242). |

41 +| Windows Management Instrumentation Command-line (WMIC) | Beginning with Windows Server 2025, WMIC is available as a Feature on Demand (FOD). It can be added with the `DISM /Add-Capability` command. It will be removed from Windows in a future release. [PowerShell for WMI](/powershell/scripting/learn/ps101/07-working-with-wmi) replaces the WMIC tool. Use PowerShell or programmatically query WMI as a replacement for WMIC. To learn more about WMIC deprecation, see [WMI command line (WMIC) utility deprecation: Next steps](https://techcommunity.microsoft.com/t5/windows-it-pro-blog/wmi-command-line-wmic-utility-deprecation-next-steps/ba-p/4039242). |

4242 | VBScript | VBScript is available as an FOD and preinstalled in Windows Server 2025, before its removal from the operating system in a later release. As a replacement for VBScript, use PowerShell for automating tasks, custom actions, or scripts. To learn more about migrating to PowerShell, see [The VBScript-to-Windows PowerShell Conversion Guide](/previous-versions/windows/it-pro/windows-powershell-1.0/ee221101(v=msdn.10)). If you're using VBScript within your webpage, functionality is currently limited to browsers predating Internet Explorer 11. We recommend migrating your webpages to JavaScript, which provides cross-browser compatibility and modern browser support. |

4343 | Windows Server Update Services (WSUS) | WSUS is no longer actively developed. All the existing capabilities and content continue to be available for your deployments. |

4444 | Rivest Cipher 4 (RC4) usage in Kerberos | RC4 usage in the Kerberos authentication protocol is deprecated. RC4 is a weak algorithm that can be abused for stealing credentials. Stronger algorithms, like AES-SHA1, should be used instead. For more information, see [Detect and Remediate RC4 Usage in Kerberos](../security/kerberos/detect-remediate-rc4-kerberos.md). |

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