Single Sign-On (SSO) lets users access multiple applications with one set of corporate credentials, usually backed by Microsoft Entra ID or another identity provider. SSO reduces password fatigue (and sticky notes), centralizes offboarding when someone leaves, and enables conditional access policies — such as blocking logins from unknown countries or requiring MFA for cloud apps. Implement SSO gradually: start with Microsoft 365 and your highest-risk SaaS tools. Pair SSO with automated user provisioning so new hires receive the right app access on day one.
