What is the benefit of hosted (aka virtual) domains?
The multi tenancy or hosted domain capability allows a service provider to host several domains on the same server and delegate administrative rights to separate domain administrators for each domain. For example, a single server could host both CompanyX.com and CompanyZ.com, and allow an administrator at CompanyX’s headquarters to administer the first domain, and an administrator at CompanyZ’s headquarters to administer the second domain, securely and independently of each other.