Active Directory connection with subdomains

My solution: Sophos Mobile Control 3.6.0.5

I want to manage Users from some subdomains with one customer account. How can I configure this?

My main domain is company.local. Then I have three subdomains. subcompany1.company.local subcompany2.company.local ...

In all domains I have users with mobile devices. In Sophos Mobile Control I could create different customer for each subdomain. But this is not my preferred solution. I want to manage all users with one customer.

What are the seetings for this way?

Thanks for the support