Cannot find old address book

[Larry]

I was using Outlook 2003 address book and recently had to switch to Office
2007 and now I cannot locate the old address data files. Have I lost my
previous contacts list?

 

[DL]

The outlook addresses are contained within Contacts which is in turn
contained within the Outlook Data File along with all your email
If you upgraded to OL2007, they are still there, or are you saying *all*
data including emails is missing?

 

[Larry]

I was only using the calendar and and the address book and yes that data is
missing or I cannot locate it on my hard drive.

 

[DL]

All outlook data is contained within a single file, by default named
outlook.pst
What is the name of your current data file?
(The Address Book is simply a View of your Contacts list)

Run an explorer search, to include hidden, what does it return for *.pst