I've gotten all the way to the point with the new SSO plugin. When i click the button that's attached to the authClient.signIn.sso, I redirect to a page with JSON: {"redirect":true,"url":"https://login.microsoftonline.com/<idp-id>/saml2/dashboard"}
I'm not understanding where the 302 redirect is supposed to happen if at all here. I've followed the beta docs (minus using the spMetadata function due to it not building the xml correctly with the entityId).