Store domain/username for Exchange on Outlook 2003 client

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Anyone know how to store the domain and username on a
client machine using Outlook 2003 and an Exchange Server?

With all previous versions of Outlook, you simply had to
add a couple keys to the registry in :

HKEY_Current_User/Software/Microsoft/Exchange
String Value : LogonDomain = "value"
String Value : UserName = "value"

These values are not used by Outlook 2003 - if anyone
knows the correct registry location, I would appreciate
the answer.