As of March 1 2017, Office 2013 is no longer available for download in the Office 365 portal or at office.microsoft.com. Direct downloads are available.
Outlook 2013: Control Panel Mail Won't Open (Fixed)
Outlook 2013's Mail applet will not open from the Control Panel following the June 2016 updates. Click-to-run installations are affected on all operating systems.
Office 2013 SP1
Office 2013 SP1 is available and should be automatically installed for Home Premium and ProPlus Click to Run subscriptions.
Fixed: Autodiscover problems with Outlook 2013 and Exchange 2007
After installing the November security updates, Outlook 2013 users had issues connecting to Exchange server 2007. These problems are fixed by the December 13 2013 update.
Outlook 2013 IMAP Troubles
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.
Outlook 2013 Update: fix for missing navigation pane
Solution for missing navigation bar in Outlook 2013 after installing September 2013 updates.
Outlook 2013 Notes have toolbars
Outlook 2013's Notes have 2 rows of tool bars.
Outlook 2013 hangs due to hardware acceleration
One of the new features in Office 2013 is Hardware Graphics Acceleration which is supposed to improve performance. It doesn't always work well on older computers (and even some new ones). Symptoms include blurred text, cursor hangs randomly, and Outlook freezing for a few seconds (or longer).
Outlook 2013 Updates and Hotfixes
Information about Outlook 2013 updates and hotfixes released in 2013.
Outlook 2013: Set reminders on Tasks in an IMAP account
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.