Action is required to manage and retain your mail. Mail received more than 3 years ago will be automatically moved from your Inbox (and Inbox sub folders) and Sent Items folder (and Sent Items sub folders) to the Deleted Items folder.
Mail in the Deleted Items folder is permanently deleted after 30 days. Note: UF Exchange does not provide restoration of individual mailbox contents from tape.
How to Create a ‘Retain Permanently’ Folder