HTC One M8 for Windows - Manual (Page 116)

If your phone can't find your account settings, go to the advanced
setup to enter the incoming and outgoing server and other
settings manually. You'll need to get these information from your
email provider.
Adding a Microsoft Exchange or Office 365 account
1. Swipe down from the top edge of the screen with one finger.
2. Tap All settings > email+accounts.
3. Tap add an account.
4. Tap Exchange.
5. Enter your email address and password, and then tap sign in.
If your account settings are found, wait for your phone to finish syncing
with your work email, contacts, and calendar.
If your account settings can't be found, follow the onscreen
instructions to enter your Exchange ActiveSync account settings
manually. Ask your Exchange Server administrator for these
settings.
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