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HTTP Error 400. The request hostname is invalid using SharePoint Application Proxy

Kyle Page 21 Reputation points
2021-07-19T21:25:15.267+00:00

Has anyone else experienced this error after completing the SharePoint Application Proxy deployment?

I have the Proxy connector set up and I have added all the required information in my Azure Active Directory(Internal URL and SPN for SSO). When I run the Test Application Proxy Configuration report, I have all green checkmarks(picture below). So I am confused as to why I am getting this error.

115998-image.png

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A group of Microsoft Products and technologies used for sharing and managing content, knowledge, and applications.
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SharePoint Server Management
SharePoint Server Management
SharePoint Server: A family of Microsoft on-premises document management and storage systems.Management: The act or process of organizing, handling, directing or controlling something.
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  1. Echo Du_MSFT 17,161 Reputation points
    2021-07-20T01:59:26.883+00:00

    Hello @Kyle Page ,

    Welcome to Q&A Forum!

    Please following steps:

    1. Go to SharePoint Central Administration >> System Settings >> Manage services on server >> Request Management
    2. Stop service and it will work fine.

    116084-1.png

    Reference link:

    Thanks,
    Echo Du

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