Custom properties modify the job scheduler configuration. You can use these settings to tune the job scheduler behavior beyond the settings that are in the administrative console.
Use the UseAPCEndpointSelection custom property
Define this custom property if you want to disable the application placement controller (APC). By default, the APC is enabled. You must have the Operations Optimization component along with Compute Grid to create this custom property. UseAPCEndpointSelection is optional, and when not created it defaults to true.