December 8, 2015, update for Outlook 2013 (KB3114349)

Applies to: Microsoft Office 2013 Service Pack 1Outlook 2013Office Home and Student 2013 RT

This article describes update KB3114349 for Microsoft Outlook 2013, which was released on December 8, 2015. This update also applies to Office Home and Student 2013 RT. This update has a prerequisite.

Be aware that the update in Download Center applies to the Microsoft Installer (.msi)-based edition of Office 2013. It doesn't apply to the Office 2013 Click-to-Run editions, such as Microsoft Office 365 Home. (How to determine?)

Improvements and fixes

  • Translates some terms in German and Russian languages for the accuracy of the meaning.
  • Adds support for Office.context.mailbox.item.close() in Outlook 2013.
  • Fixes the following issues:
    • You have some Outlook Add-ins that can access email bodies through Office APIs for Outlook 2016. However, these APIs aren't available in Outlook 2013. This update adds support for version 1.3 of the Mail Apps API requirement set in Outlook 2013.

      Note To fix this issue, install this update together with MS15-131: Description of the security update for Word 2013: December 8, 2015 (KB3114342). See KB3085636 for more information.
    • Some unnecessary network traffic occurs during AutoDiscover in Outlook 2013.
    • When you forward an email message in Outlook 2013 that has the reading pane disabled, the recipients of the email message aren't displayed in the body text.
    • When you send an email message, Outlook 2013 accesses some nickname cache entries, and then Outlook 2013 may crash.
    • When you try to delete items from public folders, you receive the following error message:
      Changes made to the item were lost due to a reconnect with the server.
    • Custom add-ins use cached access tokens instead of tokens that are retrieved from the Exchange Web Service (EWS) in Outlook 2013.
    • The Delegate can see my private items setting for a delegate is lost.
    • The Inbox folder doesn't synchronize in Outlook 2013. In addition, your mailbox is renamed as an archive mailbox or an archive mailbox is renamed as your mailbox, and you may see a duplicate view of your mailbox when you expand the archive mailbox.
    • You experience the following issues for an IMAP email account:
      • Content are moved to a renamed folder unexpectedly.
      • You can't import content to folders that have common hierarchy separators in the name.
    • Microsoft narrator can't read the number of unread email messages in an email folder in Outlook 2013.
    • It takes a long time to configure a user account in Outlook 2013.
    • Outlook crashes frequently after update 3101488 is installed.

How to download and install the update

Microsoft Update

Use Microsoft Update to automatically download and install the update.

Download Center

This update is also available for manual download and installation from the Microsoft Download Center. The updates in the Download Center can't be installed on Office Home and Student 2013 RT.If you're not sure which platform (32-bit or 64-bit) you're running, see Am I running 32-bit or 64-bit Office? Additionally, see more information about how to download Microsoft support files.

Update information

Restart information

You may have to restart the computer after you install this update.


To apply this update, you must have Microsoft Office 2013 Service Pack 1 installed.

More Information

To determine whether your Office installation is Click-to-Run or MSI-based, follow these steps:
  1. Start Microsoft Outlook 2013. 
  2. On the File menu, select Account.
  3. For Office 2013 Click-to-Run installations, an Update Options item is displayed. For MSI-based installations, the Update Options item isn't displayed.
Office 2013 Click-to-Run installationMSI-based Office 2013
The screenshot for Outlook Click to Run The screenshot for Outlook MSI


Learn about the terminology that Microsoft uses to describe software updates. The Office System TechCenter contains the latest administrative updates and strategic deployment resources for all versions of Office.

File Information

The global version of this update has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time item in Control Panel.