I'm trying to figure out if it's possible to validate input fields before executing a workflow. The scenario I have is provisioning a new virtual machine. The user must input both the VMname and the hostname prior to submitting the workflow. I have a couple of actions which will check to see if a VMname or hostname is already in use. What I want to be able to go is stop the user from submitting the workflow for execution if the names entered already exist. Is there a way I can do this?
Thanks