I recently installed Office 365 and could not get the email account setup properly in the Outlook app.
I kept getting a SMTP error.
I verified that the email password was correct by successfully logging into the webmail portal.
I discovered that I could get the account set up successfully by typing “Control Panel” in the search box at the bottom left of your screen and then click on the Mail icon.
Select User accounts in Control panel and you’ll see the mail icon.
Now add your email account using this method, making sure not to use encryption for the SMTP port 25 setting.