Your computer can't connect to the remote computer because authentication to the firewall failed due to missing credentials

Hello MK2023,

Thank you for your question and for reaching out with your question today.

Based on the information provided, it seems that the issue you're facing is related to the authentication process when launching the RDP file downloaded from the RemoteApp portal. The error message indicates a failure in authenticating with the firewall due to missing credentials.

To troubleshoot this issue, you can try the following steps:

1. Verify the configuration of the Remote Desktop Gateway (RD Gateway):
   • Ensure that the RD Gateway server is correctly configured and pointing to the appropriate RD Web Access server.
   • Check the RD Gateway settings and make sure they match the configuration in Azure AD Application Proxy.
2. Check the firewall settings:
   • Ensure that the necessary firewall rules are in place to allow inbound connections to the RD Gateway server from the internet.
   • Verify that the RD Gateway server can communicate with the RD Session Host server hosting the application.
3. Validate the Azure AD Application Proxy configuration:
   • Double-check the configuration of the Azure AD Application Proxy connector on the RD Gateway server.
   • Make sure the connector is running and properly registered with your Azure AD tenant.
   • Verify that the custom domain and certificate configurations are correctly set up in Azure AD Application Proxy.
4. Test with different clients:
   • Try accessing the RDWeb portal and launching the RemoteApp from different client machines to see if the issue is specific to a particular client.
   • Ensure that the client machines have the necessary RDP client versions and updates installed.
5. Review RDP file settings:
   • Open the downloaded RDP file in a text editor and verify the settings.
   • Ensure that the "gatewayhostname" and "gatewayprofileusagemethod" properties are correctly set to match your RD Gateway configuration.

If the issue persists, consider reviewing the event logs on the RD Gateway server and the RD Session Host server for any relevant error messages or warnings that may provide more insights into the authentication failure.

I used AI provided by ChatGPT to formulate part of this response. I have verified that the information is accurate before sharing it with you.

If the reply was helpful, please don’t forget to upvote or accept as answer.

Hi, everything are check as recommend in your last post.

I try many other solutions but still the same message while downloading the RDP file.

Bets regards?

Hi Limitless Technology,

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Thanks,

Shweta