It turned out to be a multi step process. Create an outlook.com email address, and add it to the phone. Then created a user account in Outlook 2013 desktop software with the same email address. Then synced the Blackberry to Outlook desktop so all the mail addresses came over to Outlook. Then synced the People app on the phone. Took a few hours but 2500 contacts successfully migrated.
Phone is working well so far with one SIM. Will be adding the other this weekend. It's quite snappy so far, and we haven't even added the SD card.
10-02-2014 11:00 PM