drag'n'drop from Outlook to your Exchange profile's Contact folder
you must be using Outlook tho
or you can use exmerge too...
Create a Public Folder and in the drop down box select this folder contains
Contact Items. Now copy your outlook contacts to the new Public Folder you
just created. Give the appropriate permissions to the users who need access
and you are done.
John Oliver, Jr.
MCSE, MCT, CCNA, Exchange MVP