DX Unified Infrastructure Management

A customer wants to be able to disable programmatically the processes probe when a file exists and enable the processes probe again when the file is no longer present.

I think your best bet would be to either use the NAS scheduler and use callbacks to the dirscan probe to look for the file and then a callback to disable the processes probe. The other option would be to use a batch/shell script to check for the file and the PU utility to disable the processes probe.