Hi All. I have setup an Office365 A2 (Education) trial and have a domain registered with 1&1. I set the MX record to the ***.invalid.*** string as requested by the setup process and successfully validated the domain. Priority is 100 and there are no other MX records set. However, although I can send email from the Office365 webmail client I can not receive any emails. Looking around at some other postings others have had this problem. Should Microsoft have provided additional MX / DNS details post domain validation?