Symantec,
It would be ideal that you can generate a dash board or a reporting solution that can tell you the below statistics
1. Domains that are in the enforcement list?
2. Domains that are set as Bi-directional Enforcement
3. Domains that are in the Enforcement list that are failing with the TLS validation checks?
4. Summary of Opportunistic Email Traffic vs Enforced Domain Traffic (Daily, Weekly, Monthly)