The confirmation_token of the approval this request replaces. Needed only when that approval was already approved and hasn't started yet; one still waiting for a decision is replaced automatically. Only where Layrcake runs approved actions itself (the result's approval block says execution: server); anywhere else it is refused. A dry run doesn't check it, so it refuses it: send it on the call itself.

The earliest the first emails may go out (ISO 8601). They start at the first sending-window opening at least 60 minutes after a person approves, and not before this time. It can't be later than the approval's lifetime after this request (7 days by default); a later time is refused. Only where Layrcake runs approved actions itself (the result's approval block says execution: server); anywhere else it is refused. A dry run doesn't check it, so it refuses it: send it on the call itself.