In the Monitoring task area, group jobs by type and review the job details. If the next scheduled occurrence of this job ...

In the Monitoring task area, group jobs by type and review the job details. If the next scheduled occurrence of this job is currently running, no action is required. If the job is not currently running, retry the job.
If you retry a synchronization job and it fails again, consider enabling on-the-wire compression. For more information, see "How to Enable On-the-Wire Compression" in DPM Help.