In WAP VM Clouds provider, we are able to set trigger on different actions.
Yesterday, in a new test environment, I had a problem that some of them would not trigger.
When I tested Subscription trigger, it worked fine, but none of the others worked.
Luckily I asked my MVP network for help, and fellow CDM MVP Stan showed me the path to the fix! (Check his blog here: http://www.systemcentercentral.com/author/slavizh/)
He said some actions are handled directly by WAP, and some are handled by SPF.
The SMA Web service has to use a valid certificate that is trusted by the SPF server!
It is described here https://technet.microsoft.com/en-us/library/dn457800.aspx
“For VM Clouds to trigger runbooks in Service Management Automation, the Service Management Automation web service certificate must be trusted on the computer running Service Provider Foundation. “