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BarryJordan-4667 avatar image
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BarryJordan-4667 asked BarryJordan-4667 commented

Unable to login guest through app registration

Currently have an app registration configured for an external web app.
Login works OK for regular Azure AD accounts, but invited guest users get bounced back to the MS login page starting point after attempting to login. No error messages are seen by the guest user.

No sign-in attempts are seen in the service principal. What could I be missing here?

azure-ad-app-registration
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MarileeTurscak-MSFT avatar image
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MarileeTurscak-MSFT answered BarryJordan-4667 commented

I have seen a very similar redirect issue before with my own Microsoft ID. The usual solution is to clear the browser cache, use a fresh browser, or use an incognito session. Switching to the Brave browser has resolved it in the past for me.

Are you using federated authentication? If you are using federation authentication and the user does not already exist in Azure Active Directory, the user cannot be invited. https://docs.microsoft.com/en-us/azure/active-directory/external-identities/troubleshoot

This can also happen if your redirect URIs are not sending the users to the right spot, but this doesn't sound like the case based on your subscription.

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Thanks for the response. The thing is, I actually tried the fresh/incognito browser approach with no luck.
I'm not currently federated and the guest is a fully redeemed account in Azure.
I was just wondering as well if guests logons are supported through app registrations. Not seeing any definitive info online that says it's supported or otherwise.

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