Did you change the default PST file?

You might try a right click on the store's top folder (Personal Folders),
properties, Update to color categories. That should add all categories to
the Master Category List.

If you want to export/import your categories, maybe for a separat backup,
you might use Category Manager - link in my signature.

BTW: Vista has nothing to do with your Outlook data.

--
Best regards
Michael Bauer - MVP Outlook
Synchronize Color Categories & Ensure that Every Item Gets Categorized:
http://www.vboffice.net/product.html?id=2006063&cmd=detail&lang=en&pub=6

Am Thu, 22 Nov 2007 08:42:01 -0800 schrieb Al:

All of the color categories just disappeared recently from my Outlook 2007
-
if I click on previous entries a popup window says "Not in master category
list." Is there any way to restore these? Running Windows Vista - as an
aside, this OS is the most buggy, underdone, troublesome MS travesty since
ME. This is just the most recent squirrely occurrence with software that
is
MICROSOFT software, running under their OWN OS! My fear is, that even if
I
laboriously restore it, something else will make it go away the next time
I
reboot. Rant off. Any help appreciated...