In my previous post you can read how easily it is to use the EMC to administer your Office365 account. Now you can imagine how easily it could be to migrate Exchange mailboxes from your on premises Exchange Server to Office365 or the other way around! This is how you can do that :
First open the console and select New Remote Move Request
Choose the user you wish to migrate :
Now specify the target domain and the remote database and hit next.
Hit next and watch your mailbox fly to the cloud!