Microsoft just released the new Azure Pass-Through Authentication and seamless Single Sign On option available in the new Azure AD Connect. This new authentication mechanism has a lot of great features and is well thought out, but it's not for every organization.
Check out my article, Microsoft Releases Azure AD Pass-Through Authentication and Seamless Single Sign-on, on the ENow Exchange & Office 365 Solutions Engine Blog. In it, I explain what PTA is, how it works, and how to configure it. You will learn how to deploy additional AAD pass-through connectors for high availability and configure SSO. I also discuss why AD FS may be a better solution for your business.