How can I modify my address details for new users and contacts in SBS 2000?

On the server, run REGEDIT

1. Drill down to HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Backoffice
2. On the right hand pane you will see the following keys which you can modify to suit.
a. Address1
b. Address2
c. City
d. Fax
e. Fax_Acode
f. Phone
g. State
h. Zip