Unable to setup SSL based replication between two HA triplets

Hi @uherbst
Thank you for detailed and valuable information.
I think my attempt 2 was explained in the initial post was per your suggestion on loading the certificates. I turned off “enforce-trusted-common-name” to avoid common name validation using below command.

configure replication config-sync bridge ssl-server-certificate-validation 
no enforce-trusted-common-name

Started seeing below issue:

020-10-16T19:11:04.319+00:00 <local4.notice> ip-x.x.x.x event: VPN: VPN_BRIDGING_LINK_REJECTED: #config-sync - Message VPN (108) #config-sync Bridge #CFGSYNC_REPLICATION_BRIDGE from  VPN #config-sync rejected: Service Unavailable
2020-10-16T19:11:07.324+00:00 <local4.notice> ip-x.x.x.x event: VPN: VPN_BRIDGING_LINK_REJECTED: #config-sync - Message VPN (108) #config-sync Bridge #CFGSYNC_REPLICATION_BRIDGE from v:solace100 VPN #config-sync rejected: Bad Request

I verified config-sync on both HA triplets A and B is running.
Thanks,
Raghu