![]() SIR can be enabled with the Set-Mailbox cmdlet, or you can configure the mailbox plan to have SIR enabled. By default, new mailboxes will not have SIR enabled. When an item is deleted from the “Deleted Items” folder, it is moved into a hidden folder called “recoverable items” for users who have SIR enabled. In rare cases, I delete something from my deleted items folder, and that is when the story of Single Item Recover (SIR) starts. In most circumstances, nothing should ever be permanently deleted from my Exchange Online mailbox, and that’s the way I want it. Items sit in my deleted items folder for a couple of years until they are moved to my Online Archive folder. As I am writing this, the deleted items folder in my Office 365 mailbox is currently 5.11 GB. If you do not have any retention policy configured, those items will sit in deleted items indefinitely. ![]() ![]() If you have retention policies configured, items will be removed from your deleted items folder based on the retention policy that applies. What happens from there depends on your tenant settings. In most cases, when you delete an item from anywhere in your Exchange Online mailbox, that item will be moved to the deleted items folder. When you delete an item from your Exchange Online mailbox it may or may not be gone. The term “deleted” is much like onions and ogres they can all make you cry, and they all have layers. When we are talking about Exchange Online, “deleted” does not always means deleted. I will go through what it is, how it works, and what is new in Single Item Recovery. ![]() In this blog post, I am going to look at Single Item Recovery for Exchange Online. There is one thing I will say every time about backing up Office 365 – before you buy any add-on service, you better know what is built in. Depending on the day (and, let’s be honest, depending on who I am working for) I may give you different answers. If you ask 10 experts, you will probably get 10 different opinions about how, or why, or what you should or should not backup in Office 365. I personally have written and spoken a lot about backups for Office 365. There's a lot of content out there about backups for Office 365. ![]()
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