I'm using Outlook2003 to find contacts which belong to one or both of two
categories but NOT to a third category. I can't get it to return the correct
results. What's the syntax I should be using on each line of the Advanced
Find dialogue box?

I've tried this:

(Line 1) Categories contains "ABC1" or
(Line 2) Categories contains "ABC2" and
(Line 3) Categories does not contain "ABC3"

but (I think) it just gives me everyone that doesn't have ABC3 as their
category and ignores the other two criteria. I've tried combining these
criteria with/without a search criterion specified in the 'More Choices' tab
for Categories to no avail. I've tried leaving the quotes out or in. You can
see I don't really know what I'm doing, here... ;-) I'm sure I had
something similar working ok, way back in the mists of time, but I'm blowed
if I can recreate it now, when I need it...

I know I could just move copies of all Contacts to a separate temporary
Contacts subfolder and then sort them out by category grouping to end up with
just the ones I want, but it's bugging me I can't make the 'Find' facility
work as it presumably should.

Also, why is the 'More Advanced...' button always greyed out - does that
only come into play when you've added lots and lots of lines and there's no
more room? Or does it require some missing plug-in that I've failed to
activate?

Thanks in advance!