Ok. But autodiscover obviously was not needed to synchronize mailboxes for the domain that most users use? Why is not the same manually entered OL Anywhere-information enough for O365 til pull information from the boxes that receive mail for other domains? All domains are verified in O365. It was enough information for O365 to be able to pull the account info and provision the mailboxes and is enough for current users to use OL Anywhere so why can't O365 use it to sync? I just don't get why it happily syncs mail from mailboxes with one domain but not the others?
But if this is the case, then thats the case. Please just confirm 100% that the manual information entered in a migration batch can just be used for migrating one domain (how does it even choose which one?) , even if all current mailboxes live on the same Exchangeserver.
If it comes to that, can PST export/import be done server-side (PShell) or is this something you do manually after you have connected the user to the O365 account?