Here's my scenario.
GoDaddy use a cut down version of Office 365 (no Litigation Hold and other features) so I need to transfer the domain to a full Microsoft Office tenant that has the rich admin controls.
I have a 30+ users, lots of email, lots of folders (5Gb each?). Once I start the domain transfer the only place that email will be accessible is the local ost files.
Users will then reconnect to the new accounts once I have set them up (same email adddresses as before) and no doubt the old ost's will be inaccessible with the "user.ost cannot be accessed because it has been configured for use with a different mailbox".
Is my only answer to export to pst before the move and then manually move every folder back into the newly created ost and let it sync back to the new O365?
Sounds like a manual nightmare... Is this my fate for the entire weekend? We are using Office 2010/2013/2016 on subscription