I have found lots of documentation about how to login to SharePoint using Google, Facebook, Microsoft Account, etc. But can you make it the other way around?
Can SharePoint act as an authentication provider for Third party apps and services? I'm looking into offering a seamless experience for users of Our customers' SharePoint intranets to be automatically logged into our Java web Application (SaaS).
Obviously we would need to extend our saas to support this, but can we use SharePoint's New OAuth support in any way, or STS as claims provider? Let us say that we have multiple customers that run SharePoint online.