Hey there,
I am bidding on this because I have a lot of experience in the migration to and from O365 and Exchange. I am the owner of Acuuis, LLC, a Technology firm serving the coastal regions of South Carolina. We have about 30 staff members and although I will be performing the transition for you, by hiring me, you retain access to the entire Acuuis support staff. This means that you will never have to deal with some freelancer with 5 active jobs to be responsive when something goes wrong. Even after the job, Acuuis will be there for you! I look forward to hearing from you!