When a distribution is scheduled and the installation phase has failed for connection reasons on the target computer, distribution is put on stand-by.
When you start the computer in question, and if the IDispatchAgent service is present, a dialogue between the distribution server and the agent is established to determine whether a distribution is pending. If this is the case, the distribution server programs the distribution again.
If the IDispatchAgent service is not present, the distribution will wait until a new distribution is programmed.
Pending distributions can be deleted but in no way can be modified or reprogrammed.