October 4, 2016, update for Outlook 2013 (KB3118367)

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

This article describes update KB3118367 for Microsoft Outlook 2013, which was released on October 4, 2016. This update also applies to Office Home and Student 2013 RT. This update has a prerequisite.

Be aware that the update in the Microsoft 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

  • Adds the ability to display digitally signed email message in its native HTML format and unsigned mail in Plain Text format through a registry key. See KB3118320 for more information.
  • Adds the ability to specify the Warn me before downloading content when editing, forwarding, or replying to e-mail option through a registry key. See KB3118321 for more information.
  • Translates the Font button in multiple languages in the Other Settings dialog box in Advanced View Settings in Outlook 2013.
  • Enables you to get the Exchange Web Services (EWS) URL and the scoped token that's related to a saved item.
  • Fixes the following issues:
    • Consider the following scenario:
      • You enable cached mode in Outlook 2013.
      • You add two or more Exchange accounts to the same profile.
      • You disable cached mode for those accounts, either manually or by Group Policy.
      • You delete the associated .ost files.
      In this situation, Outlook 2013 can't send email messages and the email messages are stuck in the Outbox folder.
    • When you open an .eml file in Outlook 2013, the Bcc recipients aren't displayed.
    • You would receive unexpected password prompts when Outlook 2013 connects to Exchange Server 2013 that has the MAPI over HTTP protocol enabled.
    • An embedded email message with a large number of recipients cannot be dragged into a folder.
    • Folders in Outlook 2013 may re-sync unexpectedly. See KB3197761 for details about the new synchronization behavior and controls that is associated with the fix.

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 what 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


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

Restart information

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

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 standard 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.