You’ll need to log into the Office 365 account that contains your hosted email to see the Admin option. The login page can be a bit difficult to find sometimes because it often lives on your domain host’s site, not the main Microsoft site. If you try to sign-in at Office.com, it’s usually smart enough to know where your domain is registered and redirect you to the correct login page, though. But if you can’t find it, contact your domain host, and they’ll help you.

Once you’ve logged in, you’ll be able to see the Admin option in the list of apps on the main Office 365 page, and also in the app launcher available from the nine dots.

Click on the Admin app, and you’ll be taken to the Admin Center, where you can see a menu of options on the left-hand side.

These contain the tools for administering your domain. Certain areas have their own separate consoles, which you can find by expanding the “Admin centers” node.

Each of these Admin centers opens a new range of options, such as the Security & Compliance Center.

Depending on what you’re interested in, the Admin Center can keep you busy for months. Azure Active Directory, for example, contains dozens of options, many of which would take weeks to learn and understand just on their own, which is why Azure/O365 Administration is a job all in itself in many organizations.