I'm developing a Core 2.0 SPA web application with Angular 5 as the frond end framework. I enabled Azure AD authentication using OpenIdConnect. After enabling all my PUT API methods started returning 400 bad request. GET methods work fine, but my PUT methods don't even hit the my breakpoints in the API controller. Could someone help me understand the problem please? Is it possibly token related? The response doesn't have any response message so I don't know where to begin.