Hello,
I will be migrating users from a source child domain to the parent top level domain. Currently, the source child domain users have their UPN set to the top level (target) domain. We obviously can't have a user account with the same UPN in the same forest. how should processing for this be handled?
I was thinking of creating a temporary UPN suffix in the target domain, but i'm not sure if the new staged accounts will utilize that UPN suffix as default when being created. Also, when activating the users (enabling target, disabling source), we have the option to set the UPN suffix on the target account, but nothing for changing the source account's UPN. Not sure if this would need to be scripted/changed manually after the fact.
Any insight would be beneficial.
Thanks,