Repadmin
/replsummary
Identifies domain controllers that are failing inbound replication or
outbound replication, and summarizes the results in a report.
Repadmin /Queue
Displays inbound replication requests that the domain controller has to
issue to become consistent with its source replication partners.
Repadmin /Showrep
Displays the replication status when the specified domain controller
last attempted to perform inbound replication of Active Directory
partitions