Using Outlook Contacts for Envelope

I'm running Word 2003 (11.6502.6408) SP1 under Windows XP (MCE) SP2.

When I get the "Envelopes & Labels" dialog and click the "Address Book" icon
I get a dialog with a dropdown for selecting Contacts. When I select the
appropriate entry in that list I get an apparently filtered list of the
contents of that Contact folder. In particular it seems to exclude any entry
that does NOT contain an email address. Obviously since I'm addressing an
envelope this is not what I want.

I can't see anywhere to set/clear filtering on a Contacts folder from with
Word or the Envelopes and Labels process. I'd appreciate any suggestions
that would solve this problem!

Thanks,
Bill