I am trying to migrate from an on-premise Exchange 2010 server for a small office. I don't want any AD integration, this is strictly a cut-over. I plan to migrate the data over a period of about a week or two. Looking up the documentation, I had a couple of questions that I have not been able to get a clear answer for.
1) If I migrate all of the data for a given mailbox one day, can I migrate only the changes that have occurred if I run it again just before the cut-over?
2) If I setup my Exchange Online account with the domain, will other people who use Exchange Online send to the Exchange Online account or will they use external DNS for the MX lookup? I had this issue when I was migrating a client to Rack Space and I needed to tell them to force external lookups for the domain.
Can someone point me in the right direction for this? Thanks!