Managed Exchange from web central in Outlook 2007

First you will need to create a new account. You can access the account settings menu by: Tools -> Account Settings OR Start -> Control Panel -> Mail -> Email Accounts (preferable for exchange accounts) Then choose New.
Click the checkbox that states ‘Manually Configure server settings or additional server types‘ Click Next.
Choose ‘Microsoft Exchange‘ as the E-mail Service and click Next
Enter mapi.au.server-exchange.com as the Microsoft Exchange server. enter the mailbox number as the username. Use Cached exchange mode can be enabled/disabled depending on clients needs. Once details have been entered click ‘Check Name‘
You will then be prompted for the username and password. Enter exchange\mbxxxxx and the mailbox password. Click OK.
The Username should resolve to a name which is underlined. Click ‘More Settings‘
Select ‘Connect to Microsoft Exchange using HTTP‘ Click ‘Exchange Proxy Settings‘
Enter me-au.server-secure.com as proxy server connection Ensure ‘Connect using SSL Only‘ and ‘NTLM Authentication‘ are selected. Click OK twice to exit back to the main account setup screen. Click Next then finish.

How to add an Managed Exchange from web central in Outlook 2007