I copied this from the manual:
Synchronize with Microsoft™ Office
If you use Microsoft™ Office Outlook™ on your work
computer, your phone can synchronize emails, and
events with your Microsoft™ Exchange server.
Find it: Menu > Settings > Accounts & sync > Add
account > Corporate
1 Enter your user name (email@example.com),
password, email address, and server details
including domain name and security type (server
address is the same URL you use to access your
company’s email using the Web on your computer).
Note: Contact your business IT department for
2 Touch Next.
3 Set up your sync options: select email, contacts, or
4 Touch Save & sync.