If you already have other accounts added, you may not see the Add Email Account button.
Restart Outlook by clicking Outlook in the top left corner of your screen and clicking Quit Outlook, then once there is no black dot by the Outlook icon in your dock, click the icon to reopen.Select the minus option and remove your existing account (this may take a few minutes).Click on Outlook at the top and select Preferences from the drop-down menu. When you are advised that your email account migration is complete, do the following: Once your staff mailbox has been migrated to Microsoft 365 (formerly known as Office 365), you will need to remove and re-add your email account in your Outlook for mac OS on your computer.