iPhone - Outlook Client Adding a 365 mailbox to your phone iPhone(Outlook)     Open  Outlook for iOS . The icon looks like this: Note:  Available for iOS devices using  iOS 10.0  or higher. Open the collapsed menu in the upper left corner. Note:  First time using Outlook for iOS? Just tap  Get Started . Tap  Settings   >  Add Account  >  Add Email Account .   Type your full email address, then tap  Add Account .   Enter your email account password and tap  Sign In .   Tap  Yes  or  Allow  to give Outlook permission to sync calendar, contacts, etc.   Swipe through the intro and you're now ready to use Outlook for iOS!