Exchange Online admin center
The admin portal used to manage Exchange Online email objects such as user mailboxes, shared mailboxes, distribution lists, and mail flow rules.
The Exchange admin center (EAC) is the dedicated web portal for managing Exchange Online mail objects: user mailboxes, shared mailboxes, resource mailboxes (rooms and equipment), distribution groups, mail-enabled security groups, and mail flow rules (transport rules). Administrators reach it at admin.exchange.microsoft.com or through a link in the Microsoft 365 admin center. The key exam distinction is scope: the Microsoft 365 admin center handles user accounts and license assignments, while the EAC handles mail-specific configuration such as mailbox delegation and detailed mail flow. Both portals are role-scoped views of the same tenant.
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