What is Microsoft Entra ID?
Microsoft Entra ID, formerly called Azure Active Directory, is Microsoft's cloud identity and access management service. It handles user sign-in, multifactor authentication, single sign-on and access policies for Microsoft 365, Azure, Dynamics 365 and thousands of third-party and custom applications.
Why it matters for your business
Central identity means staff use one account everywhere, access is removed in one place when someone leaves, and security rules such as multifactor sign-in apply across all connected apps.
A company registers its new customer portal in Entra ID so employees sign in with their work accounts and only members of the support group can open the admin pages.