In the scope of this guide, rolling back means transitioning all objects back to the Standard storage class. It is not possible to use a lifecycle rule to transition the objects in Intelligent Tiering back to the Standard storage class (as explained in the AWS documentation). Instead, this can be achieved manually by performing the following steps:
Run S3 Lens or S3 Inventory to get a list of objects with the Intelligent Tiering storage class.
Use the batch mechanism of AWS to write a batch job that will perform a batch copy of the objects found in step 1, this time specifying Standard as the storage class. Note that this will create a new bucket version (if the bucket is versioned) and because it’s a copy operation, the Last Modified field for each object will be updated.