This is a good place to remind you that the Architecture of the software means that your content
(migration or backup) will travel through the Essentials for Office 365 as it is deployed on its host machine.
Keep that in mind when you are looking into your network bandwidth. If you are backing up a SharePoint Online site to Amazon S3 storage, that content is being downloaded to the host machine (temporarily) and then uploaded to your Amazon S3 storage, so both download and upload operations to consider for bandwidth allocation.
This guide is designed to provide you with a self-service approach to answering some frequently presented scenarios we have encountered over the years. Due to the complex nature of everyones unique environmental configuration we cannot possibly address every situation, although we do hope it serves as a valuable resource to improve your migration and backup performance or at least help you consider some area that you may have otherwise overlooked.