December 6, 2016, update for Outlook 2016 (KB3127988)

Gilt für: Outlook 2016

This article describes update KB3127988 for Microsoft Outlook 2016, which was released on December 6, 2016. This update has a prerequisite.

Be aware that the update on the Microsoft Download Center applies to the Microsoft Installer (.msi)-based edition of Office 2016. It doesn't apply to the Office 2016 Click-to-Run editions, such as Microsoft Office 365 Home. (How to determine?)

Improvements and fixes

  • Removes unexpected disabling of add-ins in Outlook 2016.
  • Fixes the following issues:
    • Assume that you try to forward an email message that's created based on a custom form in Outlook 2016. When you send the email message or close the original email message, Outlook 2016 crashes.
    • "Disable COM add-in" warning is displayed when you try to use add-ins on a custom form.
    • After you do a "find related messages" search in Outlook 2016, tasks may disappear from the To-Do bar.
    • When you change the recurrence pattern of an appointment in a SharePoint calendar in Outlook 2016, the SharePoint calendar is out of synchronization, and the appointment isn't changed.
    • When you attach an Outlook item to an email message, the list of messages in the picker window may display the "click here to view more on Microsoft Exchange" link. Nothing will happen when you click the link.
    • When you use the /select command to select and open an email message in a public folder, you receive the following error message:
      Cannot start Microsoft Outlook.
    • The display names of root folders in the navigation pane are displayed in lowercase letters instead of the capitalization of specified letters.
    • When you print a calendar by selecting the Weekly Calendar Style, some day headers aren't printed correctly.
    • When you view the Free/Busy information in Outlook 2016, Outlook 2016 crashes occasionally.
    • When you use an app to add a persistent notification to an email item and then close the item, a Save dialog box appears incorrectly.

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.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 Outlook 2016 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 an Office 2016 application.
  2. On the File menu, select Account.
  3. For Office 2016 Click-to-Run installations, an Update Options item is displayed. For MSI-based installations, the Update Options item isn't displayed.
Office 2016 Click-to-Run installationMSI-based Office 2016
The screenshot for Word click to run The screenshot for Word MSI


Learn about the standard terminology that's used to describe Microsoft 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.