Open the Gmail app.
Tap the menu icon in the upper left corner > Settings > Add account > Exchange and Microsoft 365.
Important: Do NOT choose "Outlook, Hotmail, or Live"
Enter your full email address and tap Next.
Enter your password and tap Next.
Follow steps for your account type:
If prompted for Work/School account or Personal, make sure to choose 'Work or School account' you may see a Redirect request screen. Tap OK.
On the Incoming server settings screen, change your server to outlook.office365.com.
Follow any prompts you may get for security or device permissions, sync settings, and more.
If you have a Microsoft 365 work or school account, you may also be asked to confirm Remote security administration and approve additional security measures. In this case, choose OK or Activate.