Cancel or change a scheduled activity when it should no longer be sent as planned. The important question is whether the activity has already reached any recipients.
Before you cancel
Check who was meant to receive the activity and whether it has already been sent. If no one has received it, cancelling is usually a scheduling cleanup. If someone has received it, treat the change as a live communication decision.
What to communicate
If participants expected the activity, consider sending a direct message or another update that explains what changed. This is especially useful when a session, deadline, or assignment has moved.
What not to assume
Cancelling a future scheduled activity does not undo work participants have already done in other activities. Review engagement separately if you need to understand who has already acted.