After building a new website in AEMaaCS, it was discovered that the AEM-Managed CDN cache is not clearing hours after a page is published. What would be a way to resolve this issue?

In AEM as a Cloud Service (AEMaaCS), the standard mechanism for publishing content from the author tier to the publish tier is Sling Content Distribution (SCD). This process is integral to the AEMaaCS architecture and is the trigger for subsequent cache invalidation at both the Dispatcher and the AEM-managed CDN. If the CDN cache is not clearing, it implies a potential issue with this standard publishing pipeline. The correct resolution is to ensure content is published using the proper SCD-based mechanism, as this is the designed and supported method to propagate content and trigger the necessary cache flushes.

A. Lower the CDN TTL: This is a workaround that reduces cache duration but does not fix the underlying issue of cache not clearing upon publication.
B. Use the Replication API to invoke the publish Dispatcher flush replication agent: This uses legacy terminology. While the Replication API is used for invalidation, you don't invoke a specific "agent" in AEMaaCS.
C. Invoke the CDN flush replication agent: This is imprecise. AEMaaCS does not expose a distinct "CDN flush replication agent" for direct invocation in the way on-premise AEM does.

1. Adobe Experience Manager as a Cloud Service Documentation. (n.d.). Publishing Content. Adobe. Retrieved from https://experienceleague.adobe.com/docs/experience-manager-cloud-service/content/sites/publishing/publishing.html?lang=en. (This document states, "Publishing content from AEM author environment to the publish environment is accomplished using the Sling Content Distribution capability.")

2. Adobe Experience Manager as a Cloud Service Documentation. (n.d.). CDN. Adobe. Retrieved from https://experienceleague.adobe.com/docs/experience-manager-cloud-service/content/implementing/content-delivery/cdn.html?lang=en. (This document explains that the AEM publish service sends a cache invalidation request to the CDN upon content publication.)