I had couple of workflows created and in the error management i have used administrator all as security group to be notified in event of errors.
There is one email which I wanted to exclude from getting this notification, so I removed him from the security group via the admin console, I am also seeing in the Campaign UI that he is not listed in the users for the administrator group.
However, he is still receiving e-mail if the workflow encounters errors, how do I fix this?
Incase, if you've removed the user from administrator group on admin console and don't see the id on administrator group within ACS then go ahead and open a support ticket. This might be related to adobe ims issue.
Just to make sure you're not using workflow supervisors group to notify ACS users about workflow failures.