An error is seen in the Primary Proc log:
2/18/2014 4:31:11 AM 3 Quest.WebServices.Messaging.Authentication.AuthenticationManager 1216 Unknown thumbprint F1B28B85430424DEE2118C3CA2D2282254F3CA5C (192.168.1.2)
This error indicates that an appliance is not enrolled correctly in the HA Cluster, and correct communication will not be possible.
To correct this issue, locate the appliance(s) that are trying to communicate with the Primary appliance that is receiving these thumbprint errors in the Proc log.
Confirm that they have been added correctly to the cluster. Re-enroll them if necessary.