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Hi, You could try the seogadget tool for excel, I also had some luck with this excel addon. Haven't used either of them in a while but they both should do what you need with a bit of fiddling.

Thanks for the response. Google isn't just indexing the pages, they're sending a significant amount of traffic to them as well. Of course, not all 1M pages are the same quality, so would it be better to have a sitemap of just the highest quality pages and see if Bing will index more of that list?