I wish to set up a group domain (group.com) with 4 subdomains (CompanyA.group.com, companyB.group.com, companyC.group.com, companyD.group.com). Each company has its own domain name ie group.com, company A.com etc.
I wish to :
assign users to each subdomain and
manage mail and share calendars/files – among the subdomains.
Make mail available on iPhone/Android
Is this possible within SBS 2011 or should I have a separate Exchange 2010 product? How would you approach this?