System Center Orchestrator 2012 Beta is not supported on a domain controller: Currently Installing System Center Orchestrator 2012 on a domain controller is not supported. This is known issue for Beta release and it is because of different ProductType for domain controller, which Orchestrator Installer does not check for. This is already release noted, please see http://technet.microsoft.com/en-us/library/hh204684.aspx
Running Orchestrator 2012 on domain controller is not recommended for running in production environment, however you can use the below workaround to use in lab environments
Change the ProductType to ServerNT before install and then change it back to LanmanNT after the install
As part of the OS requirement check, Orchestrator Install is checking for “HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\ProductOptions\ProductType” to determine if the OS is Windows Server 2008 R2 or Windows 7 (for designer), basically checking if it is WINNT or ServerNT product type.
If the OS is a domain controller, the pre-requisite check fails because it’s neither WINNT nor ServerNT.
ProductType for different Windows SKUs
1. WINNT – Windows 7
2. ServerNT – Windows 2008
3. LanmanNT – Windows 2008 with Domain Controller role enabled