Proofpoint Engineering is continues to mitigate customer impact per item. We remain engaged 3rd party support to address the cause and resolve the overall issue. 

Full list of potential impact can be found here:
https://proofpoint.my.site.com/community/s/article/Proofpoint-Service-Interruption-Affecting-elements-of-Core-Email-Protection-API-and-Adaptive-Email-DLP-03-June-2026