Thanks Pratik,
Only one problem. The customer doesn't want the main domain to be verified. As stated in my example, the main domain is own by a larger company which have franchisee below it. Say for instance, owner.com.au is the main domain and I have different departments or companies below me which I initially supplied email accounts hosted in our server. This can be like myemail@rentals.owners.com.au and youremail@mycompany.owner.com.au.
Now rentals.owners.com.au would like to move to Office365. The only way I know to move them is to verify the main domain and create a subdomain as you suggested above. The problem here is that, rentals.owners.com.au will have to verify the main domain. What happens then if mycompany.owners.com.au decides to move to Office365? My understanding is that you cannot verify the domain with 2 different Office365 instances. Another problem is we don't want rentals.owners.com.au to verify our main domain.
Any ideas?
Regards
Alvin
