Place a mailbox on Litigation Hold to preserve all mailbox content.

Litigation Hold preserves items in the Recoverable Items folder in the user's mailbox. The default size for this folder is 30 GB. Depending on number and size of items deleted or modified, the size of the Recoverable Items folder of the mailbox may increase quickly. The Recoverable Items folder is configured with a high quota by default. We recommend that you monitor mailboxes that are placed on Litigation Hold on a weekly basis to ensure they don't reach the limits of the Recoverable Items quotas.