Can you elaborate your use case? We may have different means to achieve it. 

AEMaaCS does not include Letters / Correspondence Management. 

You can create a custom function and invoke it using a rule. The following documentation provides detailed information about custom functions along with examples:https://experienceleague.adobe.com/en/docs/experience-manager-cloud-service/content/forms/adaptive-forms-authoring/authoring-adaptive-form...

@aravindS , Can you provide the information requested by @pankajpr to help you further?  

@patrickpai , please confirm the information @sudhansh has asked to help you further. 

@koolForms AEM 6.5.23.0 Release is officially scheduled for June 6, 2025. The release notes with relevant docs would are scheduled to published on June 6, 2025. 

This is a very specific use case of calling AEM Forms JEE APIs in Quarkus application. You can reach out to Adobe Support/Consulting teams for help on this. 

@DavidNg6 , Did you get a chance to check if the forms core component bundles Adaptive Forms Core API (com.adobe.aemds.guide.aemds-guide-core) and Adaptive Forms Core Implementation (com.adobe.aemds.guide.aemds-guide-core-impl) are active?

@GautamGo2 is the issue resolved? or are you looking for more information to help resolve the issues. 

@GautamGo2 AEM forms integrated with Marketo Engage, there are out-of-the-box operations available in the AEM Rule Editor's "Invoke Service," such as: Get Lead by ID Get Lead by Filter Type If you were working within an AEM Adaptive Form, you could potentially use the Get Lead by Filter Type opera...