These questions arose recently: how to understand in Web Interface which domain controller ActiveRoles Server is currently using, and if it's possible to select a specific one instead of waiting for replication?
It's very easy – to do this, you should open domain properties in ActiveRoles Web Interface and click "Change Operational DC" command. On the opened page you will see current domain name, current domain controller that ActoveRoles Server works with and the list of available controllers. You could select the specific controller and click "Apply". After that operational DC will be changed.
By the way, if you want to know the ActiveRoles Server name that Web Interface uses now, you should click Help->About Web Interface: