From the OE address book - File > Export > Other address book > Text file
You will be given an opportunity to save the file at a location of your
choice. That's where you will find it :)

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Graham Mayor - Word MVP
My web site www.gmayor.com
Word MVP web site http://word.mvps.org
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> Ok, Maybe I'm stupid, but how do u export an address book to a file
> to use as a source for merging envelopes? I tried the exporting and
> it said it had been done, but I can't find it. Thanks for yor help.