How to retain Exchange Online content – An overview of the different compliance options in Microsoft 365

This blog article should help M365 Admins and other IT Staff to clarify the options which were available to retain and delete data within Exchange Online to fulfill legal requirements. It contains a broad overview and list various use cases to clarify what to use when. The article is focused on methods and features to retain Exchange Content, but also includes notes about their role in the M365 compliance Context.