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Effective October 9, KP Southern California Region retention rules will apply limits in Microsoft Outlook to your aging emails and calendar entries. Email in your inbox folder will be purged after 90 days, while email in folders outside the inbox, including the Sent and Deleted folders as well as any folders you create, will be retained for 4 years. For more details, and info about how to archive emails; extend the retention period; recover purged emails; and why KP is taking this action, click here [2].