Discovery is an inventory and an ownership exercise
Accounts and data volumes matter, but so do domain control, shared resources, business applications, delegated access and the people authorised to decide what moves.
Remediate before multiplying
Duplicated accounts, unknown owners and broken permission structures become target-platform problems if they are simply copied. Resolve material issues while the source context is still visible.
Pilot the real workflow
A useful pilot tests representative users, devices, shared data and support guidance. It should reveal permission translation, application dependencies and communication gaps.
Stabilisation is part of the move
A cutover is not complete when records change. Users need access, devices need to work, data must be validated and the route for remaining exceptions must be owned.