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This security update resolves vulnerabilities in Microsoft Office that could allow remote code execution if a user opens a specially crafted Office file. To learn more about these vulnerabilities, see Microsoft Security Bulletin MS15-099. Microsoft Office 2016 for Mac includes versions of Word, Excel, PowerPoint, OneNote, and Outlook that are designed for the Mac and yet are unmistakably Office. The September 15, 2015, update provides fixes for issues in the Office 2016 for Mac Suite (Word, Excel, PowerPoint, OneNote, and Outlook).

Note To install this update, you must be running OS X Yosemite 10.10 or a later version, and you must have a valid Microsoft Office 365 subscription. Additionally, see more information about Office 365 Subscription options. If you already have Office 2011 for Mac installed, you can run Office 2011 and Office 2016 side by side.

For a complete list of affected versions of Microsoft Office software, see KB3089664.

Improvements and fixes

This update provides the following fixes and improvements:

  • Outlook

    • This update adds support for exporting data to Outlook for Mac archive files (.olm file format). Data is exported to an .olm file, where it can be archived outside Outlook for Mac and reimported to Outlook for Mac by using the Import .olm functionality.

    • Software updates including:

      • Fixes issue that caused invitations to displayed as off by one hour in Coordinated Universal Time

      • Improves attachment support

      • Improves reminders support

      • Meeting invitations always open to the maximum width of the screen

      • Printing the calendar in month view now uses the full page for better page use

  • Word

    • Software updates including:

      • Live word count in status bar is correctly updated when you change the selection

      • Scrolling improvements

      • Zoom level is preserved when a document is saved

      • Customized keyboard that has the ability to override default keyboard shortcuts

  • Excel

    • Software updates

  • PowerPoint

    • "Resume reading" now enables you to quickly return to the position at which you last edited a presentation

    • Software updates

How to obtain and install the update

Method 1: Microsoft AutoUpdate for Mac

This update is available from Microsoft AutoUpdate. AutoUpdate is provided together with Office. It automatically keeps Microsoft software up-to-date. To use AutoUpdate, start a Microsoft Office program, and then click Check for Updates on the Help menu.

Method 2: Microsoft Download Center

This update is available for download and installation from the Microsoft Download Center:

More Information

Security update deployment information

For deployment information about this update, see Microsoft Knowledge Base Article KB3089664.

Security solutions for IT professionals: TechNet Security Troubleshooting and Support

Local support according to your country: International Support

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