A Security Update has been released for Outlook 2016. It provides “enhanced security as a defense in depth measure” as described in ADV180021 and is not related to a know security vulnerability. This update also contains additional fixes for 6 non-security issues.
Most notable fixes in this update;
- With this update installed, Microsoft Outlook 2016 restricts users from adding cloud files as attachments to digitally signed, rights-protected, or encrypted email messages.
- Assume that you sign in to Outlook 2016 by using an account that doesn’t use the modern authentication in Windows 10. The Security Support Provider Interface (SSPI) authentication prompt will sometimes appear behind other windows, and it is inaccessible by keyboard. See KB 4032226 for more information.
- Dynamics CRM functionality is blocked unless you enable all roaming folder homepages by using the EnableRoamingFolderHomepages registry key.
Office 365 subscribers in the Monthly Channel also got the following new features;
- Outlook add-in warnings
Occasionally an Outlook COM add-in can encounter problems that slows down the rest of Outlook. These problems could be due to latency of events such as switching between Outlook folders, arrival of new emails, opening Calendar items, etc. When such issues arise, Outlook will display a warning in the notification bar.
- Join Teams meetings from the Outlook Reminders dialog
When Outlook reminds users of an upcoming meeting, it will show a Join Online button if the upcoming meeting is a Teams online meeting. This is similar to the experience of joining a Skype for Business meeting from the Outlook Reminders dialog.
Note: This update can be installed via Microsoft Update or the Update Now button when you are using Office 365 and updates Outlook to version 16.0.4732.1000 (msi-based installation) or version 1807 build 10325.20118 (Office 365 based installation) or version 1803 build 9126.2275 (Office 365 Semi-Annual release).