Issues were not apparent as first, as the. All the Engineers used the 'Add shortcut to OneDrive' so they can browse the directories like they were used to through File Explorer.
Migrated the data over period of a week using Sharepoint migration tool in batches. Did some research, looked like it should technically should work, and had a couple users work off some cad drawings in Sharepoint, all looked OK. (A push from CFO to go 'cloud everything' and of course not spending any money, and IT since we wanted to retire the VM).
Just went through a migration to move our Engineering department's AutoCAD drawings to a Sharepoint site so we could retire an old on-prem VM the files live on.
