When you say the databases are constantly changing do you mean that there is
a new database each time or that the data in an existing data base is
constantly changing?
For the latter, if the main document is already set up with the mergefields
in it, all that you need to do is execute the mailmerge.

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Hope this helps.
Please reply to the newsgroup unless you wish to avail yourself of my
services on a paid consulting basis.
Doug Robbins - Word MVP
>I really need to know how to automatically update a mail merge everytime I
> open a word document that has a mail merge in it. Our databases are
> constantly changing and the lady that does the mailing does not understand
> the concept of setting up a mail merge, so I really need it to update
> automatically. If anyone can help me out I would be very grateful.
> Thank you