When is Amazon S3 hosting option being deprecated?
As of July 31, 2015 Adobe no longer supports Amazon S3 as a hosting option. DTM libraries on Amazon S3 will continue to be served until December 31, 2015, but in a read-only state. Changes made in DTM since July 31, 2015 are no longer reflected in Amazon S3 hosted files.
To deploy additional changes to a site after July 31, 2015, select a new hosting option. Self-hosting (FTP Delivery or Library Download) is the suggested best practice, but the third-party Akamai hosting is a world class option too.
For migration to another hosting option; simply configure the new hosting option in the “embed” tab in DTM. Once enabled, replace the current embed code on the site with the new code from the new hosting option.