Today I found that when I removed a Email Alert from my TimeBased-Workflow 2 months back, there was no Audit Trail Log item recorded. And the LastModifiedDate on WF had not been updated. Making the change hard to find 2 months down the track. To the point I thought I had not made the change 2 months ago at all.
I added back the Action once I realised what was going on (thank you 5 month old sandbox). And again same thing LastModifiedDate not updated and no Audit Trail log. I also tested this as an immediate action (Email Alert) on the same Workflow and no luck there either.
Seems strange this would not have Audit Trail. Salesforce's answer is this is "WAD" Working as Designed. I find that hard to believe they would purposely design in a Flaw. I will add more once SFDC come back with a better answer, because at the same time as telling me it is WAD, they also explicitly advised that adding an action creates Audit log (contradiction). So more to come...
Has it always been this way?