Note: This works on any iPhone with the version 2.0 software. The iPhone 3G comes with it, the older model phones will need to be upgraded.

If you already have your iPhone running Exchange server with IMAP, disable the account in Mail Settings.

1. upgrade your phone to iPhone OS 2.0 if necessary.
2. Set up a new mail account, selecting Exchange as in the photo below.

1. Enter your email address <your e-mail address - e.g. YourName@YourDomain.com> in the Email box.
2. Enter your Exchange username username in the Username box.
3. Enter your password in the Password box.
4. The iPhone might now warn you that it could not validate your account.  This is because it could not correctly pick out your Exchange server name.  If this is the case, enter your server name in the window.  Make sure you enter your ActiveSync server name, not the OWA server (as in Entourage).

ActiveSync server name:
ActiveSync.MyOutlookOnline.com

1. Tap the home button and go into Mail.  You should see your new account appear, and it should show your folders and email messages within a few moments.  Congratulations!  Email is now set up. Continue to the next steps to enable sync for Contacts and Calendars

		<your e-mail address - e.g. YourName@YourDomain.com>
			username

Note:  You can not sync Contacts and Calendars from both Exchange and iTunes  You must choose one or the other.  And the iPhone will delete your old entries when you enable this. Once you’re sure email is working, go back into the Exchange Account Settings tab (shown below) and tap Contacts to “ON”.

1. The iPhone will warn you about deleting your existing entries,  If you’re sure, tap “Sync”. They will be replaced with the entries from your Exchange account.

1. Now the iPhone will enable Sync. Wait a few minutes for it to sync.
2. Do the same for Calendar and you’re all set.  Wait a few minutes and you will have over-the-air Email, Contacts, and Calendar integration.