First, I think Excel has (or had) a limit. Do you really have a list of a half million records in Excel?

MapPoint slow for bulk geocoding and not that graceful with handling non-matches, but I'd imagine it can be done. Search this site for geocoding, also there are a couple articles here:

http://www.mp2kmag.com/a95--Geocodin....mappoint.html

http://www.mp2kmag.com/a98--Geocodin....mappoint.html

best,
Eric

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