Migration Dynamics 365 may be a tool that will the work for you by reading the schema and information and showing intelligence pushing it to CRM on-line. It won’t leave you worrying concerning the advanced rules for making records in CRM or having to try multiple passes at the information so as to form all of these relationships. Still use your current CRM organization whereas migrating to CRM on-line. This suggests you or your shoppers don’t have to freeze information so as to maneuver or that you simply have to expect consecutive long weekend and hope it’s enough time to complete the migration.