Will my Source email remain intact after the migration has completed? Lisa Courtney March 07, 2018 20:55 Updated Follow Answer: Yes. MigrationWiz does not modify the Source mail system, so Source email always remains intact. Related articles How do I turn off Calendar Assistant in Office 365? Supported Migration Scenarios Lotus Notes to Office 365 Migration Guide Why can't I update calendar events post-migration? Comments 0 comments Please sign in to leave a comment.