When a scheduled message has been prepared for a guest, it is not possible to change when it is going to be sent aside from sending it immediately.
The message will be sent according to the timing of the messaging rule.
To send a scheduled message immediately:
- Open the message thread with the guest
- Look under the Activity panel in the left sidebar
- Click the Edit button next to the scheduled message
- (Optional) Edit the message content as needed
- Click on Send now