We've been converting a number of devices from hybrid joined/co-managed to AAD joined/Intune by adding the existing co-managed devices to a group assigned to a deployment profile with the option "Convert all targeted devices to Autopilot" enabled. This has worked well apart from the fact that duplicate devices are created in AAD - one is the original hybrid device that shows it's registered in Autopilot (so can't be deleted) and the other is the newly AAD joined object. Is there a better workflow for this that would avoid this duplicate device object issue?
I'd love to know. I found using "Convert all targeted devices to Autopilot" to be a mistake. If the AD object is deleted before the device in AAD gets enrolled, it breaks Autopilot when the synchronized AAD object also gets deleted.