How to link existing AD accounts to the correct organization in a Microsoft Exchange Server 2010 SP1 multi-tenant environment

With Microsoft Exchange Server 2010 SP1 there is a built-in multi-tenant support feature available that replaces many features of HMC. A good overview about the features, limitations, installation and configuration is available at Technet article: Multi-Tenant Support http://technet.microsoft.com/en-us/library/ff923272.aspx  The hosting solution available for Exchange 2010 SP1 includes most of the features and functionality available in…