Windows Server Insiders topics

Windows Server Datacenter: Azure Edition preview build 29531 now available in Azure

StaceyCL_RM — Tue, 03 Mar 2026 17:25:17 GMT

Hello Windows Server Insiders!

We welcome you to try Windows Server vNext Datacenter: Azure Edition preview build 29531 in both Desktop experience and Core version on the Microsoft Server Operating Systems Preview offer in Azure. Azure Edition is optimized for operation in the Azure environment. For additional information, see Preview: Windows Server VNext Datacenter (Azure Edition) for Azure Automanage on Microsoft Docs. For more information about this build, see Announcing Windows Server vNext Preview Build 29531 | Microsoft Community Hub.

The file Microsoft_Server_InsiderPreview_LangPack_FOD_29531.iso is missing language packs.

iLikeYi — Fri, 20 Feb 2026 08:24:10 GMT

Is it difficult to put these language packs in Microsoft_Server_InsiderPreview_LangPack_FOD_29531.iso?

WinRe.wim

PackageName	PackageState	ReleaseType	InstallTime
WinPE-DismCmdlets-Package~31bf3856ad364e35~amd64~~10.0.29531.1000	Installed	FeaturePack	2/7/2026 15:07
WinPE-DismCmdlets-Package~31bf3856ad364e35~amd64~en-US~10.0.29531.1000	Installed	LanguagePack	2/7/2026 15:07
WinPE-PlatformId-Package~31bf3856ad364e35~amd64~~10.0.29531.1000	Installed	FeaturePack	2/7/2026 15:06
WinPE-PlatformId-Package~31bf3856ad364e35~amd64~en-US~10.0.29531.1000	Installed	LanguagePack	2/7/2026 15:06
WinPE-PowerShell-Package~31bf3856ad364e35~amd64~~10.0.29531.1000	Installed	FeaturePack	2/7/2026 15:07
WinPE-PowerShell-Package~31bf3856ad364e35~amd64~en-US~10.0.29531.1000	Installed	LanguagePack	2/7/2026 15:07
WinPE-SecureBootCmdlets-Package~31bf3856ad364e35~amd64~~10.0.29531.1000	Installed	FeaturePack	2/7/2026 15:07
WinPE-SecureBootCmdlets-Package~31bf3856ad364e35~amd64~en-US~10.0.29531.1000	Installed	LanguagePack	2/7/2026 15:07
WinPE-UpdateOrchestrator-Package~31bf3856ad364e35~amd64~~10.0.29531.1000	Installed	FeaturePack	2/7/2026 15:08
WinPE-UpdateOrchestrator-Package~31bf3856ad364e35~amd64~en-US~10.0.29531.1000	Installed	LanguagePack	2/7/2026 15:09

Account blocked downloading any Insider ISO

OLDMAN2018 — Tue, 17 Feb 2026 02:54:33 GMT

Same basic message as the Google Fiber user, however, I know what caused my account to be blocked. I did not approve a Firewall request for Webview2 while using Server 2022 and Duck Browser (you know which one as I am not approving of nor recommending a non-MSFT issued browser here) to Download the ISO for Vnext on the Server Insider's Download page. I am still able to log into the page, select a build, choose my language, and I get the error after clicking Confirm. It also happened in Edge and on my cell phone using Cellular and it's proprietary browser. I installed 26534, and though it did allow me to attach my insider id to it, it would not dl a newer build, nor any Insider build for Windows 11 either. The page simply says to contact Microsoft support if you feel you got this in error. Of course, that would not accomplish anything except confuse some MSFT contacted Tech support and possibly incur a fee for me. You have my account info.
Any help clearing it would be appreciated.

Announcing Windows Server vNext Preview Build 29531

StaceyCL_RM — Thu, 12 Feb 2026 19:24:30 GMT

Hello Windows Server Insiders!

Today we are pleased to release a new build of the next Windows Server Long-Term Servicing Channel (LTSC) Preview that contains both the Desktop Experience and Server Core installation options for Datacenter and Standard editions and Azure Edition (for VM evaluation only). Branding remains Windows Server 2025 in this preview - when reporting issues please refer to Windows Server vNext preview.

Build 29531 establishes a new Server preview baseline build. Please perform a clean install of Build 29531 (or later) using the installation media linked below.

Please note: Upgrades from earlier Windows Server vNext preview builds are not supported. We encourage all Windows Server vNext preview users to perform a clean install to reliably continue in the Windows Server vNext preview program.

While upgrades from earlier Windows Server previews (Build 26525 and older) are not technically blocked by setup.exe, a number of known issues have been identified related to upgrades necessitating a release of a new baseline build for our Server vNext Preview Program.
The new baseline build (29531) will not be Flighted due to upgrade issues. Flighting support will resume with future vNext preview releases.

What's New

[NEW] ReFS Boot is enabled for Windows Server vNext preview builds.

Known Limitations

- ReFS Boot systems create a minimum 2GB WinRE partition.
- When WinRE cannot be updated due to space constraints, the system may disable WinRE. Disabling WinRE does not remove the partition.
- If the WinRE partition is deleted and the boot volume is extended over it, this operation is unrecoverable without a clean install.

For more information, please visit: Resilient File System (ReFS) overview | Microsoft Learn

Feedback Hub app is available for Server Desktop users! The app should automatically update with the latest version, but if it does not, simply Check for updates in the app’s settings tab.

Known Issues

Upgrading from earlier builds of Windows Server vNext previews (26525 or older) are not supported. Please perform a clean install of build 29531 or later.

Users may experience failures when attempting to upgrade from earlier previews (build 26525 and older). VMs may fail to upgrade or start after upgrade from older preview builds impacting live migration and failover cluster scenarios.

Download Windows Server Insider Preview (microsoft.com)

Flighting: The label for this flight may incorrectly reference Windows 11. However, when selected, the package installed is the Windows Server update. Please ignore the label and proceed with installing your flight. This issue will be addressed in a future release.

Available Downloads

Downloads to certain countries may not be available. See Microsoft suspends new sales in Russia - Microsoft On the Issues.

Windows Server Long-Term Servicing Channel Preview in ISO format in 18 languages, and in VHDX format in English only. 
Windows Server Datacenter Azure Edition Preview in ISO and VHDX format, English only.
Microsoft Server Languages and Optional Features Preview

 Keys: Keys are valid for preview builds only 

Server Standard: MFY9F-XBN2F-TYFMP-CCV49-RMYVH
Datacenter: 2KNJJ-33Y9H-2GXGX-KMQWH-G6H67
Azure Edition does not accept a key.

Symbols:  Available on the public symbol server – see Using the Microsoft Symbol Server. 

Expiration: This Windows Server Preview will expire September 15, 2026.

How to Download

Registered Insiders may navigate directly to the Windows Server Insider Preview download page. If you have not yet registered as an Insider, see GETTING STARTED WITH SERVER on the Windows Insiders for Business portal.

We value your feedback!

The most important part of the release cycle is to hear what's working and what needs to be improved, so your feedback is extremely valued. Please use the new Feedback Hub app for Windows Server if you are running a Desktop version of Server. If you are using a Core edition, or if you are unable to use the Feedback Hub app, you can use your registered Windows 10 or Windows 11 Insider device and use the Feedback Hub application.  In the app, choose the Windows Server category and then the appropriate subcategory for your feedback. In the title of the Feedback, please indicate the build number you are providing feedback on as shown below to ensure that your issue is attributed to the right version:

     [Server #####] Title of my feedback

See Give Feedback on Windows Server via Feedback Hub for specifics.

The Windows Server Insiders space on the Microsoft Tech Communities supports preview builds of the next version of Windows Server. Use the forum to collaborate, share and learn from experts.  For versions that have been released to general availability in market, try the Windows Server for IT Pro forum or contact Support for Business.

Diagnostic and Usage Information

Microsoft collects this information over the internet to help keep Windows secure and up to date, troubleshoot problems, and make product improvements. Microsoft server operating systems can be configured to turn diagnostic data off, send Required diagnostic data, or send Optional diagnostic data. During previews, Microsoft asks that you change the default setting to Optional to provide the best automatic feedback and help us improve the final product.

Administrators can change the level of information collection through Settings. For details, see http://aka.ms/winserverdata. Also see the Microsoft Privacy Statement.

Terms of Use

This is pre-release software - it is provided for use "as-is" and is not supported in production environments. Users are responsible for installing any updates that may be made available from Windows Update. All pre-release software made available to you via the Windows Server Insider program is governed by the Insider Terms of Use.

@Windows Server

Developer Platform

New Build

New Windows Server vNext preview coming next week!

StaceyCL_RM — Thu, 05 Feb 2026 19:41:03 GMT

Hello Windows Server Insiders!

A new Windows Server vNext preview release is coming next week!

We have a number of features to share with you and can't wait to hear your feedback. Stay tuned!

Please note: Upgrades from earlier Windows Server preview builds are not supported. We encourage all Windows Server preview users to perform a clean install using this new baseline build once available.

While upgrades from earlier Windows Server previews (Build 26525 and older) are not technically blocked by setup.exe, a number of known issues have been identified related to upgrades necessitating a release of a new baseline build for our Server Insider Program.

The new baseline build will not be Flighted due to upgrade issues. Flighting support will resume with future preview releases.

How to Download

Diagnostic and Usage Information

Administrators can change the level of information collection through Settings. For details, see http://aka.ms/winserverdata. Also see the Microsoft Privacy Statement.

Terms of Use

@Windows Server

Developer Platform

New Build

Windows Server 2025 arm64

Fulco — Wed, 04 Feb 2026 17:45:31 GMT

Will there be an official release of Windows Server 2025 arm64? If so when?

The last Canary Cannel release worked fine on a M1 (or higher) Apple computer with the use of Parallels.

Shadow Copy with 6 days delay

ServetKaplan — Wed, 04 Feb 2026 14:07:48 GMT

a { text-decoration: none; color: #464feb; } tr th, tr td { border: 1px solid #e6e6e6; } tr th { background-color: #f5f5f5; }

Shadow Copy
Windows Server 2022 Datacenter (VMWare 7.1)
The MaxShadowCopies registry value has been increased to 256.
Shadow Copies have been redirected to a different hard disk; FS=NTFS.
The schedule is set to run three times per day.
The maximum size is set to “Limit” with 1,700,000 MB.

Current issue:
Shadow Copies were available normally for several months.
Now, suddenly, the Shadow Copies are displayed with a 6‑day delay.

NTFS permissions are partially not working.

ServetKaplan — Wed, 04 Feb 2026 13:29:55 GMT

Participant A is sometimes unable to see Participant B’s files.
The issue can be resolved by clicking the option:
"Replace all child object permission entries with inheritable permission entries from this object."
However, the problem keeps reappearing.

Windows Server 2022 Datacenter (VMware 7.1), formatted as NTFS.

Windows Server Insiders Community

Jangk — Tue, 30 Dec 2025 01:16:27 GMT

Good job

Windows Server Datacenter: Azure Edition preview build 26534 now available in Azure

StaceyCL_RM — Tue, 09 Dec 2025 08:08:24 GMT

Hello Windows Server Insiders!

We welcome you to try Windows Server vNext Datacenter: Azure Edition preview build 26534 in both Desktop experience and Core version on the Microsoft Server Operating Systems Preview offer in Azure. Azure Edition is optimized for operation in the Azure environment. For additional information, see Preview: Windows Server VNext Datacenter (Azure Edition) for Azure Automanage on Microsoft Docs. For more information about this build, see Announcing Windows Server vNext Preview Build 26534 | Microsoft Community Hub.

This is our last preview for 2025. Please join us in January 2026 for new features and new content!

Announcing Windows Server vNext Preview Build 26534

StaceyCL_RM — Thu, 04 Dec 2025 21:40:40 GMT

Hello Windows Server Insiders!

Today we are pleased to release a new build of the next Windows Server Long-Term Servicing Channel (LTSC) Preview that contains both the Desktop Experience and Server Core installation options for Datacenter and Standard editions, Annual Channel for Container Host and Azure Edition (for VM evaluation only). Branding remains, Windows Server 2025, in this preview - when reporting issues please refer to Windows Server vNext preview. If you signed up for Server Flighting, you should receive this new build automatically.

This is our last preview for 2025. Please join us in January 2026 for new features and new content!

What's New

Windows Server Flighting is here!!

If you signed up for Server Flighting, you should receive this new build automatically later today.

For more information, see Welcome to Windows Insider flighting on Windows Server - Microsoft Community Hub

Feedback Hub app is now available for Server Desktop users! The app should automatically update with the latest version, but if it does not, simply Check for updates in the app’s settings tab.

Known Issues

SMBDirect - Live Migration

Users may experience performance issues during live migration of cluster nodes resulting in timeouts triggering failures across the stack. Network traffic is not flowing in through RDMA among cluster nodes resulting in a fallback to TCP/IP and reduced performance of up to 5x Live Migration times causing timeout-related failures. This will be addressed in a future preview release.

Download Windows Server Insider Preview (microsoft.com)

Flighting: The label for this flight may incorrectly reference Windows 11. However, when selected, the package installed is the Windows Server update. Please ignore the label and proceed with installing your flight. This issue will be addressed in a future release.

Available Downloads

Downloads to certain countries may not be available. See Microsoft suspends new sales in Russia - Microsoft On the Issues.

Windows Server Long-Term Servicing Channel Preview in ISO format in 18 languages, and in VHDX format in English only.
Windows Server Datacenter Azure Edition Preview in ISO and VHDX format, English only.
Microsoft Server Languages and Optional Features Preview

Keys: Keys are valid for preview builds only

Server Standard: MFY9F-XBN2F-TYFMP-CCV49-RMYVH
Datacenter: 2KNJJ-33Y9H-2GXGX-KMQWH-G6H67
Azure Edition does not accept a key.

Symbols: Available on the public symbol server – see Using the Microsoft Symbol Server.

Expiration: This Windows Server Preview will expire September 15, 2026.

How to Download

We value your feedback!

The most important part of the release cycle is to hear what's working and what needs to be improved, so your feedback is extremely valued. Please use the new Feedback Hub app for Windows Server if you are running a Desktop version of Server. If you are using a Core edition, or if you are unable to use the Feedback Hub app, you can use your registered Windows 10 or Windows 11 Insider device and use the Feedback Hub application. In the app, choose the Windows Server category and then the appropriate subcategory for your feedback. In the title of the Feedback, please indicate the build number you are providing feedback on as shown below to ensure that your issue is attributed to the right version:

[Server #####] Title of my feedback

See Give Feedback on Windows Server via Feedback Hub for specifics.

The Windows Server Insiders space on the Microsoft Tech Communities supports preview builds of the next version of Windows Server. Use the forum to collaborate, share and learn from experts. For versions that have been released to general availability in market, try the Windows Server for IT Pro forum or contact Support for Business.

Diagnostic and Usage Information

Administrators can change the level of information collection through Settings. For details, see http://aka.ms/winserverdata. Also see the Microsoft Privacy Statement.

Terms of Use

Windows Admin Center Preview - 2511 English [MSI Corrupt]

bpatrick_servlin — Sun, 30 Nov 2025 22:54:35 GMT

When attempting to launch the WindowsAdminCenterPreview_2511.msi, I received an error message (See Below).

In addition, when I test the MSI using 7zip, the archive fails to validate. This occurred downloading the installer package twice over a two-day period.

My system info is below.

Windows Server Datacenter: Azure Edition preview build 26525 now available in Azure

StaceyCL_RM — Tue, 18 Nov 2025 18:22:26 GMT

Hello Windows Server Insiders!

We welcome you to try Windows Server vNext Datacenter: Azure Edition preview build 26525 in both Desktop experience and Core version on the Microsoft Server Operating Systems Preview offer in Azure. Azure Edition is optimized for operation in the Azure environment. For additional information, see Preview: Windows Server VNext Datacenter (Azure Edition) for Azure Automanage on Microsoft Docs. For more information about this build, see Announcing Windows Server vNext Preview Build 26525 | Microsoft Community Hub.

Announcing Windows Server vNext Preview Build 26525

StaceyCL_RM — Thu, 04 Dec 2025 21:37:07 GMT

Hello Windows Server Insiders!

Today we are pleased to release a new build of the next Windows Server Long-Term Servicing Channel (LTSC) Preview that contains both the Desktop Experience and Server Core installation options for Datacenter and Standard editions, Annual Channel for Container Host and Azure Edition (for VM evaluation only). Branding remains, Windows Server 2025, in this preview - when reporting issues please refer to Windows Server vNext preview. If you signed up for Server Flighting, you should receive this new build automatically.

What's New

Windows Server Flighting is here!!

If you signed up for Server Flighting, you should receive this new build automatically later today.

For more information, see Welcome to Windows Insider flighting on Windows Server - Microsoft Community Hub

Feedback Hub app is now available for Server Desktop users! The app should automatically update with the latest version, but if it does not, simply Check for updates in the app’s settings tab.

Known Issues

SMBDirect - Live Migration Users may experience performance issues during live migration of cluster nodes resulting in timeouts triggering failures across the stack. Network traffic is not flowing in through RDMA among cluster nodes resulting in a fallback to TCP/IP and reduced performance of up to 5x Live Migration times causing timeout-related failures. This will be addressed in a future preview release.

Download Windows Server Insider Preview (microsoft.com)

Flighting: The label for this flight may incorrectly reference Windows 11. However, when selected, the package installed is the Windows Server update. Please ignore the label and proceed with installing your flight. This issue will be addressed in a future release.

Available Downloads

Downloads to certain countries may not be available. See Microsoft suspends new sales in Russia - Microsoft On the Issues.

Windows Server Long-Term Servicing Channel Preview in ISO format in 18 languages, and in VHDX format in English only.
Windows Server Datacenter Azure Edition Preview in ISO and VHDX format, English only.
Microsoft Server Languages and Optional Features Preview

Keys: Keys are valid for preview builds only.

Server Standard: MFY9F-XBN2F-TYFMP-CCV49-RMYVH
Datacenter: 2KNJJ-33Y9H-2GXGX-KMQWH-G6H67
Azure Edition does not accept a key.

Symbols: Available on the public symbol server – see Using the Microsoft Symbol Server.

Expiration: This Windows Server Preview will expire September 15, 2026.

How to Download

We value your feedback!

The most important part of the release cycle is to hear what's working and what needs to be improved, so your feedback is extremely valued. Please use the new Feedback Hub app for Windows Server if you are running a Desktop version of Server. If you are using a Core edition, or if you are unable to use the Feedback Hub app, you can use your registered Windows 10 or Windows 11 Insider device and use the Feedback Hub application. In the app, choose the Windows Server category and then the appropriate subcategory for your feedback. In the title of the Feedback, please indicate the build number you are providing feedback on as shown below to ensure that your issue is attributed to the right version:

[Server #####] Title of my feedback

See Give Feedback on Windows Server via Feedback Hub for specifics.

The Windows Server Insiders space on the Microsoft Tech Communities supports preview builds of the next version of Windows Server. Use the forum to collaborate, share and learn from experts. For versions that have been released to general availability in market, try the Windows Server for IT Pro forum or contact Support for Business.

Diagnostic and Usage Information

Administrators can change the level of information collection through Settings. For details, see http://aka.ms/winserverdata. Also see the Microsoft Privacy Statement.

Terms of Use

This is pre-release software - it is provided for use "as-is" and is not supported in production environments. Users are responsible for installing any updates that may be made available from Windows Update. All pre-release software made available to you via the Windows Server Insider program is governed by the Insider Terms of Use.

Problema ao instalar a versão Windows 11 Insider Preview Feature Update 26220.7051 no Windows 11.

LuanC — Sat, 01 Nov 2025 22:44:39 GMT

Quando eu tento instalar essa atualização aparece do nada uma janela dizendo que meu computador não atende aos requisitos de sistema do Windows 11 no momento e o motivo é que "não é possível instalar o Windows em um pen drive usando o programa de instalação". Só que eu não estou usando nenhum Pen Drive no meu computador, ou seja, não tem Pen Drive plugado na entrada USB do meu PC e também mesmo assim o meu PC possui todos os requisitos para qualquer instalação ou atualização desse Windows 11 PRO e outra segundo a verificação de integridade do meu Windows 11 que executei disse que o meu PC atendia sim a todos os requisitos não sei porque está aparecendo isso pra mim. Gostaria que me ajudassem!OBS: Essas são todas as informações de hardwares do meu PC atualmente.

Impossível um PC desse nível não atender a todos os requisitos para usar o Windows 11 PRO em suas últimas atualizações. O que será que está havendo?

Unable to download Windows 11 Client Arm64 Insider Preview Dev Channel Edition

marcjdumont — Thu, 30 Oct 2025 08:39:59 GMT

Error

We are unable to complete your request at this time. Some users, entities and locations are banned from using this service. For this reason, leveraging anonymous or location hiding technologies when connecting to this service is not generally allowed. If you believe that you encountered this problem in error, please try again. If the problem persists you may contact page for assistance. Refer to message code 715-123130 and c21934f3-66c0-43e3-9e88-c5869adeae48.

I am in the US and simply want to download this. Please provide a usable link without restrictions.

For those with Windows Insider Problems to read please before posting in this Server Insiders Forum

OLDMAN2018 — Thu, 30 Oct 2025 06:08:36 GMT

For all Windows Insider Build issues Home, Pro, Pro for Workstations, Etc. the Windows Insider Forum is

https://learn.microsoft.com/en-us/answers/tags/953/windows-insider

Respectfully meaning to be helpful

Thank You

p.s. Can Microsoft please lock this conversation topic as closed and if possible pin it?

Can't roll-back from 25h2 to 24h2.

Austin1 — Tue, 28 Oct 2025 01:35:52 GMT

A few days ago, my PC automatically updated from version 24H2 to 25H2, and ever since then, I've been experiencing persistent issues that I haven't been able to resolve. Unfortunately, the option to roll back to the previous version seems to be unavailable, which has made troubleshooting even more difficult. I've tried just about everything I could think of—tweaking settings, running diagnostics, checking for compatibility problems, and even reaching out to support forums—but nothing has worked so far. It's been incredibly frustrating, and I'm still stuck with the same problem.

Windows Server Datacenter: Azure Edition preview build 26501 now available in Azure

StaceyCL_RM — Thu, 16 Oct 2025 16:40:02 GMT

Hello Windows Server Insiders!

We welcome you to try Windows Server vNext Datacenter: Azure Edition preview build 26501 in both Desktop experience and Core version on the Microsoft Server Operating Systems Preview offer in Azure. Azure Edition is optimized for operation in the Azure environment. For additional information, see Preview: Windows Server VNext Datacenter (Azure Edition) for Azure Automanage on Microsoft Docs. For more information about this build, see Announcing Windows Server vNext Preview Build 26501 | Microsoft Community Hub.

RDS Connection Broker High Availability

nichellatti — Tue, 14 Oct 2025 20:02:49 GMT

We're starting to plan for a fully available Windows Server 2025 RDS farm. We already have a SQL Server cluster on Linux Ubuntu in the environment. I couldn't find any Microsoft documentation stating whether a SQL Server cluster on Linux can be used. Does anyone have any official references on this topic?

Current SQL Server cluster environment:

2 SQL Server Standard 2022
Linux Ubuntu 22.04, Linux cluster (Pacemaker + Corosync)

Thank you.