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Steps to add your corporate email account in Outlook 365 and the new Outlook app, with a screenshot of every screen. Screenshots show the Turkish interface.
All the values you will use during setup are below. Replace yourdomain.com with your own domain name; the username is always your full email address, not just the "name" part.
The step-by-step email setup wizard asks for your email app and address, then guides you through every screen with settings tailored to your address. We never ask for your password.
Outlook tries automatic setup and is often wrong for corporate addresses; that is why we proceed with advanced setup.

Outlook asks for an account on first launch. If you already use it, use the Add account link at the top left. After typing the address, press the Advanced setup button instead of Continue; this way you can enter the server details yourself.

In the "Choose your email provider" list that opens, scroll down among options such as Gmail and Yahoo and select the IMAP row. If you want to keep mail on a single computer only, you can choose POP.

Type your password, then turn off the Use recommended settings switch. When the switch is off, the server and port fields become editable.

In the same window, scroll down and fill in the SMTP section. The username is again your full email address and the password is the same password. When done, press the Continue button.

The new Outlook syncs IMAP accounts through the Microsoft cloud. As the screen also says, if you continue, your mail is also processed on the Microsoft side.

Outlook connects to the server and tries the details you gave. This screen takes a few seconds.

The account is being created and folders are being downloaded. If your mailbox is large, this step may take a few minutes.

If you see your email address and the Inbox folder on the left, the setup is complete. Send yourself a test email and check whether you receive it.
The server details are the same in all of them; only the look of the screens changes.
Classic Outlook versions (2013-2021)
iOS and iPadOS Mail app
Android phones and tablets
The Mail app on Mac
Windows, Mac and Linux