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.
Sync iCloud.com and Me.com sent items with Outlook 2010 or Outlook 2007 by configuring Outlook's Sent folder to use iCloud's Sent Messages folder for sent items.
How to configure an Outlook.com IMAP account in Outlook. Once configured, you can use it to upload mail to the Outlook.com servers.
Understanding Outlook 2013's handling of IMAP sent folders.
Outlook 2013 changes how IMAP accounts are handled. Instead of using two data files, Outlook 2013 uses an .ost file for IMAP accounts and stores appointments, tasks, contacts, and notes in the ost, in folders labeled "(This computer only)".
When you use an IMAP account in Outlook 2013, appointments and contacts are stored in the IMAP data file. Create a local pst file and move the appointments and contacts to the local data file.
Outlook 2010 hotfixes and updates released in 2012
How to configure Outlook 2013 IMAP accounts to get the full flag follow-up options (tomorrow, next week, etc.) and use a custom quick-step that saves email as task with text.
Outlook 2013 uses the XLIST or LIST-ENHANCED command to get the Sent, Deleted, and Junk mail folder names from the IMAP server. Although you can no longer change the folders in Outlook, many IMAP servers let you select the folder to use. You'll need to log into your account's web interface to make the change.
A number of features were removed from Outlook 2013. Some features, like Suggested Contacts, were hated by users, others, like the To-Do Bar and Windows Search, were replaced by a less functional feature (Pinned Peeks) or removed completely.