We need to migrate our SmarterMail server away from our current hosting company. The hosting company is generally non-responsive so we aren't expecting much if any cooperation for the migration. It looks like the best method for us is going to be to set up a new server on AWS and then run mailbox migration for those users who still have active accounts.

Once the migration process is initiated by a user on the new server is there any alteration/deletion of data (messages, calendar events, tasks, etc) on the old server or does all data remain intake?