This post details my very simple solution to an extremely unnecessary and kind-of simple error that I encountered when logging into SharePoint. However, you could run into the same error after configuring Azure Active Directory authentication to a custom web application. The error message comes in at least 2 variants. These are shown below: AADSTS90056: This endpoint only accepts POST, OPTIONS requests. Received a GET request. The other one I’ve…Continue reading How to resolve AADSTS90056 – “The endpoint only accepts POST requests. Received a GET request.”