SAML "Hmmm… can't reach this page"

Max Lu 1 Reputation point

We have registered a new app that requires SAML authentication. Azure AD as Identity Provider and the app as Service Provider. When I test the Identifier (Entity ID) (a URL) it shows "Hmmm… can't reach this page". We have also installed SAML tracer extension but does not see any Significant Errors. Is there any way to check further to SAML authentications in Azure AD?


Microsoft Entra ID
Microsoft Entra ID
A Microsoft Entra identity service that provides identity management and access control capabilities. Replaces Azure Active Directory.
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  1. Marilee Turscak-MSFT 36,246 Reputation points Microsoft Employee

    Hi @Max Lu ,

    Thanks for your post! There are a few reasons why the "Hmmm… can't reach this page" error might occur:

    1) There is a problem with the URL format. Make sure to include https:// in the prefix for the Entity ID.

    2) There are conditional access policies in place blocking the authentication, or there is a network connectivity problem.

    3) The Assertion Consumer Service URL is not configured.

    4) There is a firewall blocking connectivity.

    The best way to log more information about the error is to capture a Fiddler trace when this happens.

    Let me know if you are able to test these things or provide the trace.

    If the information helped you, please Accept the answer. This will help us and other community members as well.

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