Symptom

Posture flow fails for endpoints connected to ISE. you will get error "Posture failed due to server issues. Contact your system adminstrator" Please be aware that this situation happens when remote DB update is failing for any reason (could be connection issue, could be PAN busy not responding) so it is even possible that PAN is up, running and in sync but if remote DB update does not work you will face the issue.

Conditions

remote DB update is failing for any reason (could be connection issue, could be PAN busy not responding).

Workaround

Bring back the primary PAN and restart the flow. Promote SAN to PAN. If this works fine then you can promote back original PAN to Primary admin role.

Further Problem Description