When you click on delete account option here on ISC UI, it doesn’t trigger an account delete on the target application, but instead just “deletes” the account on the UI. It is usually used when you want to re-run correlation for wrongly correlated accounts.
To delete the account on the target, you need to handle this in the provisioning logic. For example, if your target is AD, one of the ways to handle this is in the before provisioning rule, taking into account when you should delete: like certain identity attributes, the lifecycle state, or other parameters. You can change the operation of the original provisioning request (like Disable) to Delete within the rule.
Thank you, Sushant. It’s really a shame to always have to find workarounds for very simple needs… but I think your solution will be able to meet my needs for the time being.