In the Account management page, click Manage admin roles.
*Note: The Manage admin roles feature is only available to the tenant owner and service admins.
To assign an
admin role to specific users, select the admin role, click Assign users,
enter the username into the Users box, and then click Save. You
can also add Microsoft 365 users or groups from the address book.
To manage the users of an admin role, hover over the Users column of that admin role and click the Edit button. In the Users box, you can enter new users or delete users, and then click Save.