Step 1: Go to Settings.
Step 2: On the Settings screen, tap Mail, Contacts, Calendars.
Step 3: Tap Add Account.
Step 4: Tap Exchange.
Step 5: Enter your Email address, Password, and a short Description (i.e. your company's name) for your email.
Step 6: Tap Next.
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   Note: Autoconnect will try to find the settings you need to configure for your account. If autoconnect is unsuccessful, you can manually configure your device by entering the information listed below.
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 Server — outlook.office365.com.
 Username — Type your full email address (for example, [email protected]).
Step 7: Click Next.
Step 8: Click Save