You are correct however that Application Custom Properties are not available as macros to be included in message body text for the "APM: Component" property type.
Thank you. Is there a reason for that?
My goal with this and all our alerts is to display the "tier" (importance) of the node, application or interface in question. Otherwise I'd have to create separate alerts for each tier and it gets messy. If the variable is available in "trigger conditions", why isn't it, in "trigger actions". It's just a database field value, isn't it?