It needs to run once the agent is up and active.
The ./allownopwd.sh needs to run by the root user on *NIX.
Restart the agent from the Skybot Scheduler or updated an agent from the Scheduler and the blessing of the ./allownopwd.sh is still in effect.
If the agent is stopped or the agent has crashed the ./allownopwd.sh needs to be run again.
On *NIX this can be run from the init.d but make sure there is a delay so that the agent is up and active.
Error you will see in the agent log:
on host "xxxxxx" does not key an authorized agent execution - authorization failed