Multiple collections exist in our TFS server 2012 eco system. If you open TFS Administration console, it gives you option to configure build service and corresponding controller/ agent for one Collection.
How do I activate Build controller for other collections?
http://blogs.msdn.com/b/jimlamb/archive/2010/04/13/configuring-multiple-tfs-build-services-on-one-machine.aspx link is of really very useful post by Jim lamb. Thanks Jim.
Here is the steps:
1. Create a new build service on your Build Server.
2. Set env variable
3. Start the TFSMgmt ( Admin console) on command prompt. Admin console Interface will not recognize the env variable.
4. Configure Controller/ Agent as usual. Puhh.. Done..