We need to delete your email account and re-add it.
- To do this Go into Settings, Mail, Accounts, Exchange and Delete Account.
- Then go back into Settings, mail, Accounts and add it back.
- Choose Exchange, enter your email address and hit Next,
- Then it will ask you to Sign In or Configure Manually - choose Sign In
- Then enter your password on the Microsoft login page.
- Then you should be able to open your mail.