When you change the root folder, Outlook re-syncs the mailbox and folders that have not synced up will be lost if you don't have a backup copy. The first, and preferred, method is to add Inbox to the IMAP root.To do this, go to File, Account Settings and double click on your affected IMAP account. (If the Inbox is not your root folder, setting Inbox as the root won't work, as it will hide all of the other folders.) If that doesn't work, try disabling the option to show only subscribed IMAP folders.After the latest round of Office 2013 updates, some IMAP users are reporting their Inbox is not listed in their profile, is empty, or their IMAP accounts aren't syncing.This is the result of the November 12 updates, KB2837618 and KB2837643.Remove the check then close the dialog to return to Outlook. If the IMAP account still doesn't work, Outlook is crashing, or you connect to Exchange 2007, you need to uninstall the updates or revert to an earlier build of Office 2013.Go to Microsoft Office 2013 Click-to-Run virtualization to find the previous version number.Having 10 years of experience in different technologies including, Office Systems, Exchange Server, Mac Technology, and Open Source email server platform.Ask him the query when you stuck in critical issue.
If you have custom folders created in Outlook, confirm they are synced up to the server before changing the root folder.
Fixing the IMAP issues in Office 365 and Outlook 2013 requires removing the installed updates immediately.
Fix IMAP Synchronization Issues in Outlook 2013 and Office 365 Since the IMAP Synchronization issues encountered after installing any of the KB2837618 or KB2837643 updates, removing them will certainly fix them immediately.
Getting the Outlook PST repaired will fix all these issues, but you must be sure about how to use this software.
Note: Keep a recent backup copy of your mailbox in order to avoid the loss of crucial information. Blog author is a reputed system administrator in a big IT organization.