Add the envelope to a document and print the current page 360 times?
Or
Download the envelope templates from my web site. Create a new envelope from
the template with the required address and print that 360 times
Also see http://www.gmayor.com/Alternative_Return_Addresses.htm just in case
what you are asking is somewhat different ;)

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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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> How to add return address for 360 envlopes without having to type
> each one individually?