Description of the security update for Outlook 2016: October 9, 2018

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 Security Advisory ADV180026.

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

This security update contains improvements and fixes for the following nonsecurity issues:

• Assume that you are upgrading from Outlook 2010 to Outlook 2016, and you set the Account registry key to import sharing accounts that are in a SharePoint list. After the upgrade completes, a duplicated SharePoint list is created in the .PST profile that contains the SharePoint List.
• This update adds support for the Bcc MailTip. Bcc recipients will now receive an informative message when they click Reply All. The message will warn them that replying all as a Bcc recipient will reveal their presence in the mail thread.
• When you disable the Reply All button by using the DisabledCmdBarItemsList registry key, the Forward button is also accidentally disabled.
• Data loss prevention (DLP) policy tip text is not visible in the "Dark Grey" theme.
• The message body of an attached email message is not displayed correctly.
• When the message body of an email message includes a text line that begins with a space and exceeds 988 octets, Outlook fails to upload the message to the IMAP server.
• When you send email messages which contain international email addresses, Outlook 2016 crashes.
• You can't publish a calendar to a server in the following scenarios:
• The server is a Web Distributed Authoring and Versioning (WebDAV) server. 
• The server needs an authentication to upload data.
• The server doesn't exist in your forest, and you have to enter your credential when you publish the calendar.

• This update improves Czech translations for Outlook 2016.
• This update adds the translation of informative messages that are displayed when Bcc recipients click Reply All to reply to the email message for all languages.