auth on a site with both windows and another mechanism enabled

[clechner77]

Is it possible to authenticate, using Windows Auth, to a site that has both Windows Auth and a custom wsfed solution enabled? I'm not talking about on different zones, but on the same zone. I realize I could extend the site and add only windows, but I'd love to avoid that.

[koltyakov]

With mixed auth, AFAIK, it's not about auth flow but the corresponding requests, which should contain additional x-forms_based_auth_accepted: f header. This might be helpful. My own personal preference is never to configure mixed auth in SharePoint ever.