Rajat Aneja wrote:

It is a new machine not the upgrade of same machine from XP to Vista.

Then you should be able to copy the file
%AppData%\Microsoft\Outlook\mailprofile.NK2 and put it in the equivalent
folder in Vista, making sure it has the same name as the mail profile there.

By the way, importing a PST is NEVER the correct way to transfer Outlook
data. Just reuse the PST by configuring the mail profile correctly.
--
Brian Tillman [MVP-Outlook]