The “dumpster” has been a feature of Exchange since Exchange 2000 to provide a last-chance opportunity for users to recover deleted items without having to ask an administrator to restore data from a backup. The current implementation, introduced in Exchange 2010, uses a folder structure under the Recoverable Items folder rather than a special database view.
Microsoft is listed as one of the “Challengers” in Gartner’s Magic Quadrant for Enterprise Information Archiving (29 October 2015), which is testimony to the hard work and effort put into building out the compliance features over the last few years since their debut in Exchange 2010.
Email systems seem to be in a perpetual state of migration. Since 1996, the on-premises implementation of Microsoft email technology has gone through nine major changes, or roughly one every two years. No sooner are you done and dusted with one migration than the next appears on the horizon. It’s a wonder that we get any real work done at all.
Recently I had occasion to check the default retention policy (called the Default MRM Policy) for my Office 365 tenant. As you do, I ran the Get-RetentionPolicy cmdlet and saw the following: