Unable to install any Add-In Apps in Outlook

Tulio Fernandez 15 Reputation points
2024-10-11T16:03:55.8866667+00:00

Hello, as the title says, I can't install any type of application on my Outlook. The only one I have is Slack, which has been installed for months. I hadn't needed to install any other applications until today, and now I'm encountering this error. It doesn't matter which application I'm trying to install; ALL of them give me the same error, the "The redirect URI" is the same on every single app I try, I cannot install anything. It's not letting me attach an image but this is the text:

AADSTS50011: The redirect URI 'https://omexexternal-prod.eastus.cloudapp.azure.com/landing' specified in the request does not match the redirect URIs configured for the application '3f520182-023f-4483-8cc1-acb6b6c64280'. Make sure the redirect URI sent in the request matches one added to your application in the Azure portal. Navigate to https://aka.ms/redirectUriMismatchError to learn more about how to fix this.

Request Id: b6dd27f2-cac1-40fe-87c8-a5cc443c0a00

Correlation Id: ce40561d-45e0-408e-bd4b-5d14d27ac126

Timestamp: 2024-10-11T01:00:14Z

Message: AADSTS50011: The redirect URI 'https://omexexternal-prod.eastus.cloudapp.azure.com/landing' specified in the request does not match the redirect URIs configured for the application '3f520182-023f-4483-8cc1-acb6b6c64280'. Make sure the redirect URI sent in the request matches one added to your application in the Azure portal. Navigate to https://aka.ms/redirectUriMismatchError to learn more about how to fix this.

I already posted this in another Q&A Microsoft group for Outlook, and they instructed me to post it here. I would appreciate it if someone could help me.

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  1. alta94 2,181 Reputation points
    2024-10-11T16:10:30.67+00:00

    Dear

    1. From the Error its clearly state the redirect URL in SSO is misconfigured.
    2. On Azure - Enterprise Application - Search for your application - SSO (left pan) - make the setup has the correct reply/logout/redirect URLS.
    3. Highly recommend to check this setting from Global admin account or Cloud Application Administrator.

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