I've a MU running the MU domain mapping plugin, it working fine but I wanted to map a subdomain from a non-main blog domain, something like this:
site1.com (primary blog - ok)
site2.com (mapped from xyz.site1.com - working)
eng.site2.com (that is the question...)
Can you advise me on the way to map correctly eng.site2.com wich is actually xyzeng.site1.com .
Thanks you. Have a nice day