Description of the security update for Outlook 2016: September 12, 2017

There is a Microsoft Office update for defense-in-depth updates to help improve security-related features. To learn more about the vulnerability, see Microsoft advisory ADV170015.

Note To apply this security update, you must have the release version of Outlook 2016 installed on the computer.

• Improve the following translation in the Brazilian version of Outlook 2016.

  The CTRL + B shortcut can't save an email message in Inline Reply mode when you use the Brazilian keyboard.

• Add an option to prevent Outlook 2016 from connecting to an Exchange account unless the connection uses Active Directory Authentication Library (ADAL). To enable this option, see KB4011124 for more information.

• When you try to add data to a profile through the Mail Applet in Control Panel, you receive the following error message:

  An unknown error occurred, error code: 0x8000ffff.

• After you mark an item as read in an IMAP folder in Outlook 2016, the item is changed to unread.
• Custom MAPI applications sometimes can't be shut down.
• Add-ins don't load due to the "Operation Failed" failure that occurs when the Microsoft Installer (.msi)-based edition of Outlook 2016 is connected to Microsoft Exchange Server 2013.
• Assume that you use the Send to Mail Recipient function for a document in Word 2016. When you copy the recipients from an email message to the new email message for the document in Outlook, Word 2016 may crash.
• In certain configurations, Office Add-ins Store URL may point to an incorrect server.