Do I need to do anything, such as re-encrypt all content in an S3 bucket, if I want to make use of IAM and KMS? - Do I need to do anything, such as re-encrypt all content in an S3 bucket, if I want to make use of IAM and KMS? - Alfresco - Alfresco Content Connector for AWS S3 - Alfresco/Alfresco-Content-Connector-for-AWS-S3/4.0/Alfresco-Content-Connector-for-AWS-S3/Alfresco-Content-Connector-for-AWS-S3/Content-Connector-for-AWS-S3-FAQ/Do-I-need-to-do-anything-such-as-re-encrypt-all-content-in-an-S3-bucket-if-I-want-to-make-use-of-IAM-and-KMS - 4.0

You don't need to do anything. Any existing content is still encrypted as it was when initially uploaded. For example, if the content was encrypted with AES256 it will remain accessible and encrypted under AES256.