Microsoft Exchange ActiveSync allows users to access information in their Microsoft Outlook accounts on mobile devices such as the Apple iPhone. By setting up Exchange ActiveSync on an iPhone, users have access to e-mails, contacts and calendar events from their desktop Outlook account. The direct push feature built into ActiveSync means changes made to the Outlook account will automatically be updated on the iPhone.
Obtain the Microsoft Exchange server domain and server address for your Outlook account. If you do not know this information, contact your system administrator.
Tap "Settings" on the iPhone home screen and select "Mail, Contacts, Calendars." Tap "Add Account" and select "Microsoft Exchange" from the list.
Enter your complete Outlook e-mail address, Exchange server domain and Outlook username and password in the provided fields. Under "Description," enter a name for the account of your choosing. Tap "Next" to proceed.
Allow the iPhone to search for your company's Exchange server. If it cannot locate the server, it will prompt you to enter the Exchange server's complete address. Enter this information in the "Server" field if necessary and tap "Next" to continue.
Choose the items that you want synchronised to your iPhone. The options include Mail, Contacts and Calendars. By default, all items are selected. Tap the "On/Off" slider next to an entry to turn off synchronisation for that item. Tap "Save" and the items will automatically be synchronised.
Back up the Contacts and Calendar entries on your iPhone before beginning this procedure by connecting your iPhone to your computer. This allows data lost on the iPhone during this process to be restored later from your computer.
Synchronising Contacts and Calendars will automatically replace the address book and calendar entries on your iPhone with the data from your Outlook account. If you do not want to replace this data on the iPhone, do not enable synchronisation for these options.