Glossary
Admin Center
The Microsoft 365 admin center at admin.microsoft.com — the primary tenant-level admin portal.
The Microsoft 365 admin center at admin.microsoft.com is the primary tenant-level admin portal for Microsoft 365. It's where administrators manage users and licences, view service health, configure organisation-wide settings, run billing, and access reports. From here, the left-hand navigation also links out to the specialist admin centers for each service — Microsoft Entra, Exchange, Teams, SharePoint, Purview, Defender, Intune, and Power Platform — each of which exposes far more configuration than the headline portal. Access is gated by Entra ID admin roles such as Global Administrator, User Administrator, and Exchange Administrator.