Categories are stored in the Registry:
http://www.slipstick.com/outlook/olcat.htm

--
Russ Valentine
[MVP-Outlook]
"
wrote in message
...
My contact categories (all customized) were lost when my Outlook was moved
from one server to another. I can still see these categories in my
Contacts -
but they are no longer in the Master list of categories available....is
there
a way to recover this list without having to manually re-enter each
category
I previously made on the old server.