Hello, I work for a construction company and we just switched over to a new email server. Office365. So we had to delete all our guys emails on their phones and tablets and add the new email. All of the guys have android phones except one guy has an iphone5. I walked him through how to delete the old email account and to add it back with the new password for the server. The account is added but he is saying all of his contacts are missing. Any idea how to fix this?