On the Start screen, flick left to the App list, then tap Settings.
Tap Email & Accounts.
Tap Add an Account > Outlook.
Tap the Email Address field, then enter your email address for your Exchange email account.
Tap the Password field, then enter your Exchange mailbox password.
Tap Sign In.
Depending on whether the account settings are automatically found, do the following:
If the account settings are found, wait for your Exchange email, calendar, and contacts to be synced to your Windows phone.
Once the sync completes, you're done.
If your account settings are not automatically found, do the following:
On the Outlook screen that asks you to check your information, enter the following information, then tap Sign In.
Username: your full Exchange email address
Password: your mailbox password
Domain: EXCHANGSERVER
Server: mail.exchangeserver.net.au
SSL: ticked