To use Cross Region Replication on a bucket, versioning must be enabled on both the source and destination buckets. After enabling versioning, a replication configuration must be established with appropriate IAM roles.
To begin using Cross Region Replication (CRR) on a bucket, you must first enable versioning on both the source and destination buckets. Without versioning enabled, CRR cannot be configured or operated. Additionally, you will need to set up a replication configuration, which involves specifying the source and destination buckets, choosing what replicated objects are, and setting up the proper IAM roles to allow for the necessary permissions.