Here are the instructions to create a new profile with the new Office 365 email account.
Choose Start > Control Panel > Mail
In Windows 10, use the Cortana search box and type Control Panel, and then click Control Panel
Open the Control Panel, and in the Search box at the top of window, type Mail.
In the Mail setup window, select Show Profiles
In the Profiles windows, click Add
Type a name for the new profile. This name is not visible anywhere else. It is just for reference.
Fill in the fields for Email Address, Password, and Retype Password
Make sure both boxes are unchecked on the bottom left and click Finish
Select Always use this profile
From the pull down menu, select the profile name that you created
Launch Outlook and it will load your new email. It will take a while to sync all folders especially if you have a large mailbox. The best thing to do is to leave your computer on overnight to let it sync all items.
When it is complete, you will see All folders are up to date in the bottom of the Outlook window.