The migration of my in-house SBS2011 went well while following your migration guide. The guide is extremely thorough and easy to follow.
I do have a question about the Mobile Devices that appear in the Windows Server Essentials Dashboard. There are only two devices that appear in the list, but there should be at least one more (see the attached screenshot). The two that appear are my wife's iPad and iPhone. My iPhone does not appear in the list and I don't know how to make it appear. I have tried deleting the email account from my iPhone and re-adding it, but that did not work.
My devices do appear in the O365 Exchange Admin Centre (see attached screenshot).
Do you have any idea how to get my iPhone to appear there?