The Download shared folders and Download Public Folder Favorites settings are enabled.Outlook is configured to use Cached Exchange mode.Starting in Outlook 2016, the Mail to keep offline setting applies to your own mailbox, shared mailboxes, and public folder favorites if the following conditions are true: For example, if you set this value to 1 (one) month, the message displays Currently displaying all messages newer than 1 month, as shown in the following screenshot.Īlso, when you search in a shared mailbox or public folder favorite, older items are missing from the search results. The number of days, weeks, or months that is displayed in the message depends on what you have configured for the Mail to keep offline setting in Outlook.