Exchange Online Backup, permanently deleted items policy

Our customer are always asking us about the best options to backup Exchange Online. Sometimes, there is even a confusing between litigation-hold, archive, journaling, and backup. Let keep in mind that these services are different and should be implemented based on the specific needs. In this post, we will only focus on back up. Basically, what happen after a user completely remove an item (mail, contact, calendar, and tasks) from their mailbox or Outlook and they need restore that item back to the mailbox. The good think is that with the new Exchange 2016 Exchange CU6 now you can restore items to the original folder as mentioned in one of my previous post (June 2017). Natively, Exchange is set for 14 day retention for deleted items. However, you can extend the retention and administrative recovery to 30 days. If you want to support recovering message beyond 30 days, you would need to use a 3rd party service for the backup.

Here are the examples on how to change how long permanently deleted items are kept. (Only available in PowerShell)

Example 1: Set Emily Maier’s mailbox to keep deleted items for 30 days. In Exchange Management Shell, run the following command.

Set-Mailbox -Identity "Emily Maier" -RetainDeletedItemsFor 30

Example 2: Set all user mailboxes in the organization to keep deleted items for 30 days. In Exchange Management Shell, run the following command.

Get-Mailbox -ResultSize unlimited -Filter {(RecipientTypeDetails -eq 'UserMailbox')} | Set-Mailbox -RetainDeletedItemsFor 30

For more information about this blog, please contact our experts at info@skybridgepro.com or submit your question via twitter to @SkyBridgeUS.. We will be happy to assist you or provide any help.

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