I got a new Lenovo laptop running Windows 10 and iTunes 12. I am running Outlook from Office 365, and have iTunes set to use Outlook for syncing Contacts and Calendar. But when I synced my iPhone 6 to iTunes through the computer it wiped out all my existing Calendar and Contact data, although Outlook on the computer has all the information. I tried using the "Replace Contacts and Calendar" option, but that didn't accomplish anything. Please help.