Hello,
Based on this thread you should be able to do something with USMTGUI, maybe it's worth trying on a PC to see if it achieve what you want :
https://social.msdn.microsoft.com/Forums/expression/en-US/08a2d5f4-1294-4ac6-9173-8c09e12f9c91/how-to-migrate-existing-local-profile-to-azure-ad-profile?forum=WindowsAzureAD
Regards,