If you are having issues creating a new mail profile, when setting up an Office 365 mailbox, the steps below should resolve the problem.

First create a blank profile.

• Open Control Panel

• Go to Mail (Microsoft Outlook)

• Click on Show Profiles

• Select Add and give profile a Name

• Click OK and on the next prompt, click on Cancel:

• On the next prompt, Select Ok and it will create a blank profile

• Make sure the new profile is selected and applied as follows:

Now, when you open the Outlook app, make sure to click on Advanced options and select "Let me setup my account manually":

After this screen, select the account type as O365 and you can now follow the onscreen prompts for the setup.