well, but as you discussed with others on the forum, migration manager doesn't migrate everything,
it seems there are troubles with email settings (forwards) that are lost, IMAP data that is lost, Horde Data....
This makes it impossible to use the migration manager for us.
You suggested to someone to install old plesk on a new server, use the backup and restore and upgrade to the new plesk to avoid dataloss.
that's why we are asking for the upgrade path.
but we are open for any suggestion.
thanks