When migrating visitor cookies it is often required to migrate from
multiple 3rd-party tracking domains (e.g. track.mysite.com and
track.mysite.co.uk and track.mysite.org) to the new first-party tracking
domain (e.g. track.mynewsite.com). The old, script-based method for
handling visitor migration allowed you to do this easily, but the new
server-side method, where Adobe do the configuration for you, does not
allow this. Instead, at best, numerous sub-sub domains must be set up,
with associated ...