[CR #418026] When you add a secondary RMS under a primary RMS, and the secondary RMS status is reported as SUSPECT, Replication Manager does not immediately report any information in the Reason column of the List view or in the Details pane of the suspect RMS.
Workaround:
In the Details pane, right-click the suspect RMS and select Properties. The reason for the SUSPECT state displays.
Close the Details pane, wait for the duration of the monitoring interval, then return to the Details pane. The Reason column is now populated with information. The default monitoring interval is 60 seconds.