Q: "Mail Accounts" doesn't show up as option to choose to migrate from XP

I am attempting to migrate files from a WinXP computer to a Mac Mini running Mountain Lion. Almost all files transferred successfully, but it doesn't appear that the Outlook email transferred. In fact "Mail Accounts" doesn't show up as an option to choose in the migration screen. I have done the migration successfully to three other computers, but they were running Lion. Any ideas?