What is Seamless SSO by Microsoft? Everything You Need To Know
Blog post from WorkOS
Seamless Single Sign-On (SSO) by Microsoft is a version of SSO specifically designed and optimized to tie in with the Microsoft ecosystem. It allows users to authenticate once and then access multiple different services and apps, mediated by Microsoft's Entra ID. Seamless SSO uses Entra ID's directory system to store users and what they can access and enables "silent logins" with Microsoft 365 products like PowerPoint and Teams. It is also optimized for authentication on Windows devices using the Integrated Windows Authentication service. Over the years, Seamless SSO has persisted through a few name and product changes alongside Microsoft's Active Directory. Implementing Seamless SSO involves setting up an Entra server via Azure, enabling Seamless SSO inside Entra Connect, deploying it to users via Group Policy, and testing its functionality.