Windows server 2012R2 Windows Admin Center not working

Hello Пятко Олексій,

Thank you for posting in Q&A forum.

Here are some troubleshooting steps you can follow:

1. Ensure you are using a supported browser such as Microsoft Edge or Google Chrome.
2. Open Task Manager on the server and go to the Services tab. Ensure that the ServerManagementGateway or Windows Admin Center service is running.
3. Use PowerShell to test the network connection to the Gateway:

Test-NetConnection -Port <port> -ComputerName <gateway> -InformationLevel Detailed

Replace <port> with the port number you configured for Windows Admin Center and <gateway> with the server's name or IP address.

4. Ensure that your browser and server are using compatible TLS settings. Outdated or unsafe TLS settings can prevent secure connections.
5. Try accessing the Windows Admin Center in a private/incognito browser session. If it works, clear your browser cache and cookies.
6. If you are using a self-signed certificate, ensure it is correctly installed and trusted by your browser. verify that the certificate thumbprint does not contain any invalid characters.
7. Windows Admin Center requires PowerShell features that are not included in Windows Server 2012 R2 by default. Install Windows Management Framework (WMF) version 5.1 or later on the server.
8. Ensure that the necessary ports are open on your firewall. If you have installed Windows Admin Center in an Azure VM, make sure you have added an inbound port rule for HTTPS.
9. If the issue persists, consider uninstalling and reinstalling Windows Admin Center. Delete the Server Management Experience folder located at C:\Windows\ServiceProfiles\NetworkService\AppData\Roaming\Microsoft before reinstalling.

I hope the information above is helpful.

If you have any questions or concerns, please feel free to let us know.

Best Regards,

Daisy Zhou

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