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- koskila
How to fix "AADSTS50011: Reply address did not match because of case sensitivity."
So, you got an AADSTS50011 error code? It's just Azure AD's authentication acting up because of an invalid reply address! Here are a bunch of different reasons that could have led to this error. This post describes the variant where the URL's case sensitivity differs from what's configured. For me, the most typical scenario where I run into this error is accessing the app from SharePoint.


