Hi Amanda
We have fix Price data migration service which many other partners utilize when they need to migrate customers from onprem to online. You can find more info on www.migr8.online. Maybe it can relevant at some point.
Med venlig hilsen / Best Regards

Sarkis Derbedrossian 
Co-founder & Partner
Phone: +45 26 60 58 52
Techdio A/S | Strandvejen 125 | 2900 Hellerup | Danmark
www.techdio.dk |+31 31 38 38 | CVR/VAT: 39 25 63 63
Control your data, Say NO to duplicates. Prevent, Clean, Automerge www.duplicate-detection.com
Fix price Data Migration service from MSCRM OnPremise to Dyn365 www.migr8.online