Outlook for Microsoft 365 Apps Feature Update for November 2020

News

Microsoft released the November feature update of Outlook for Microsoft 365 Apps in the Current Channel (previously known as the Office 365 Monthly Channel). This is a bit earlier than normal but that is because Thanksgiving is this week.

It comes with 3 new features for Outlook and 4 highlighted fixes. The new features and fixes are listed below;

  • SVG Clipboard Support
    You can now paste SVG content from Office into 3rd party apps.
  • Switch Office themes automatically
    Office can automatically switch themes to match your Windows 10 theme settings.
    File > Office Account and choose “Use system setting” under the Office Theme drop-down.
  • User Experience Updates for Tasks
    A visual refresh of task items.
  • We fixed an issue that caused the To field to be blank when sending a status report on a task.
  • We fixed an issue that caused the MailItem.BeforeAttachmentAdd event to be broken.
  • We added a regkey that allows customers to disable filetime inclusion for attachments in IDataObject operations (i.e. drag drop, clipboard).
    • HKCU\SOFTWARE\Microsoft\Office\16.0\Outlook\Attachments
    • REG_DWORD: IncludeFileTimesInDataObject
    • 0 = filetimes are excluded.
    • 1 = (default) filetimes are included.
  • We fixed an issue that caused inline images to disappear when replying to a message with a protection label from Azure Information Protection.

Note: Depending on your installation type, this update can be installed via the Update Now button in Outlook or the Microsoft Store and updates Outlook to: Version 2011 (Build 13426.20274).


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Add Teams, Skype, Zoom and other chat, call or meet now links to your signature

Chat & Meet in SignatureCommon signatures include a greeting, your name, your company name and possibly a website address and a phone number.

Since nowadays people contact each other a lot more via online meeting tools such as Teams, Skype and Zoom, you can also add special links which will allow the receiver to directly contact you via one of those methods as well.

With the use of recognizable icons, you can easily include these references without making your signature look huge.

This guide starts off with an example of a signature which is small but contains several instant communication links as well. After that, an overview is given of the instant communication links that can be used with commonly used IM and video conferencing clients.

Continue reading: Add Teams, Skype, Zoom and other chat, call or meet now links to your signature


Outlook 2016 / 2019 / 365 Update for November 2020

News

A new rollup update has been made available for all Click-to-Run installations of Outlook 2016, Outlook 2019 and Outlook as part of a Microsoft 365 subscription.

It contains 6 security updates for Excel (3), Word (1) and Office (2).

In addition, it contains 1 documented non-security fix for Outlook Current Version 2010, 7 fixes for Monthly Enterprise Version 2009, 8 fixes for Monthly Enterprise Version 2008, 8 fixes for Semi-Annual (Preview) Version 2008 and 2 fixes for Semi-Annual Enterprise Version 2002. Most notable fixes are;

  • Version 2008, Version 2009 and Version 2010
    We fixed an issue that caused users to be unable to grant Editor permission to their delegates.
  • Version 2009
    Addressed an issue that caused some users to observe Outlook unexpectedly starting in an offline state.
  • Version 2008 and Version 2009
    We fixed an issue that caused users to experience the application to terminate unexpectedly when selecting a search result.
  • Version 2008
    We fixed an issue where users can now disable IRM (Information Rights Management) for Outlook without having to disable it for the rest of the Office applications.
  • Version 2002 and 2008
    We fixed an issue where optional connected experiences blocked web add-ins from loading.
  • Version 2002
    We fixed an issue that caused users to be unable to send as or on behalf of a Distribution List that was hidden from the Global Address List.

Based on your release channel, you’ll be updated to the following version;

  • Microsoft 365 Apps, Outlook 2016 Retail, Outlook 2019 Retail
    Version 2010 (Build 13328.20356)
  • Monthly Enterprise
    Version 2009 (Build 13231.20514)
    Version 2008 (Build 13127.20760)
  • Semi-Annual Enterprise (Preview)
    Version 2008 (Build 13127.20760)
  • Semi-Annual Enterprise
    Version 2002 (Build 12527.21330)
    Version 1908 (Build 11929.20974) 
  • Outlook 2019 Volume License
    Version 1808 (Build 10368.20035)

Note: Depending on your installation type, this update can be installed via the Update Now button in Outlook itself or the Microsoft Store. This update does not apply to msi-based installations of Office 2016.


Outlook 2016 (MSI) Update for November 2020

News

A Rollup Update has been released for Outlook 2016. This is a non-security update which contains the following documented improvement.

  • This update changes the default signature hash algorithm for Secure/Multipurpose Internet Mail Extensions (S/MIME) messages and enables the administrator to manage them by using the following registry keys; UseAlternateDefaultHashAlg, DefaultHashOID and DefaultHashParam.

View: Download information for KB4486720

Note: This update can be installed via Microsoft Update and updates Outlook to version 16.0.5071.1000. This update does not apply to Perpetual and Office 365 based installations of Office 2016.


Exchange 2019, 2016 and 2013 Security Updates for November 2020

News

Security updates have been released for Exchange 2013, Exchange 2016 and Exchange 2019.

  • CVE-2020-17083: Microsoft Exchange Server Remote Code Execution Vulnerability
  • CVE-2020-17084: Microsoft Exchange Server Remote Code Execution Vulnerability
  • CVE-2020-17085: Microsoft Exchange Server Denial of Service Vulnerability

None of the vulnerabilities are currently publicly disclosed nor exploited. The Exploitability Assessment is rated: Exploitation Less Likely.

View: Description of the security update for Microsoft Exchange Server 2019, 2016, and 2013: November 10, 2020
Download: Security Update For Exchange Server 2019 CU7 (KB4588741)
Download: Security Update For Exchange Server 2019 CU6 (KB4588741)
Download: Security Update For Exchange Server 2016 CU18 (KB4588741)
Download: Security Update For Exchange Server 2016 CU17 (KB4588741)
Download: Security Update For Exchange Server 2013 CU23 (KB4588741)


Get to know me better; I got interviewed by Office Insiders

News

As part of the Office Insider Spotlight series, I got interviewed by the people of the Office Insiders blog.

The Office Insiders blog is the official blog from Microsoft highlighting upcoming changes in the Office applications as part of a Microsoft 365 subscription.

As an active Office Insider, they thought it would be nice to catch up with me and asked me the following questions;

  • Tell us about why you love the Office Insider program.
  • What is something you’ve created because of the Office Insider program?
  • Tell us about your journey in tech.
  • What aspects of technology inspire you the most?
  • What is one word that best describes how you work?
  • Which superhero character do connect with in real life?
  • What movies or books or other forms of art inspire you the most?

Many thanks to Armelle O’Neal and Jerriann Sullivan of the Office Insiders blog for this opportunity and promoting the MVPs and Office Insiders.

View: Office Insider Spotlight: Robert Sparnaaij


Edit the HTML source code while composing a message in Outlook

Edit HTML Code buttonWhen composing a message in the HTML format in Outlook, the HTML code is automatically generated by the WordHTML engine. Unfortunately, Outlook does not provide a direct way of editing this generated HTML code.

With the EditHTML macro from this guide you can edit or completely replace the HTML of a message you are composing. This makes it much easier to make specific modifications or use the HTML code that you’ve created in another HTML editor.

This way you can make sure that your carefully created design, like for a newsletter, isn’t being modified again by WordHTML and remains compatible with other mail clients.

Continue reading: Edit the HTML source code while composing a message in Outlook


Outlook 2013 Security Update for October 2020

News

A Security Update has been released for Outlook 2013. It resolves the following vulnerability;

  • CVE-2020-16949: Microsoft Outlook Denial of Service Vulnerability
    A denial of service vulnerability exists in Microsoft Outlook software when the software fails to properly handle objects in memory. An attacker who successfully exploited the vulnerability could cause a remote denial of service against a system.
    Exploitation of the vulnerability requires that a specially crafted email be sent to a vulnerable Outlook server.
    The security update addresses the vulnerability by correcting how Microsoft Outlook handles objects in memory.

View: Download information for KB4484524

Note: This update can be installed via Microsoft Update or the Update Now button when you are using Office 2013 Click-To-Run and updates Outlook to version 15.0.5285.1000.


Outlook 2010 Security Update for October 2020

News

A Security Update has been released for Outlook 2010. It resolves the following vulnerability;

  • CVE-2020-16949: Microsoft Outlook Denial of Service Vulnerability
    A denial of service vulnerability exists in Microsoft Outlook software when the software fails to properly handle objects in memory. An attacker who successfully exploited the vulnerability could cause a remote denial of service against a system.
    Exploitation of the vulnerability requires that a specially crafted email be sent to a vulnerable Outlook server.
    The security update addresses the vulnerability by correcting how Microsoft Outlook handles objects in memory.

Important!
This is the last scheduled Security Update for Outlook 2010 as it has now reached the end date for Extended Support. It is highly recommended to update to a later version of Outlook or an alternative mail client as soon as possible.

View: Download information for KB4486663

Note: This update can be installed via Microsoft Update and updates Outlook to version 14.0.7261.5000.


Schedule a recurring email with Outlook and PowerShell

Recurring Email buttonDo you need to send the same emails on a recurring basis like daily, weekly or monthly? Sending out reminders, forwarding reports or the latest offers and prices can be a tedious task.

Outlook doesn’t natively have this feature but with some PowerShell code or add-in, it can be done quite easily .

The PowerShell code in this guide allows you to send an email template, that you’ve created in Outlook. Optionally, it can look for a specific file to attach at the moment of sending to make sure you are always sending the latest version of the file. This guide contains step-by-step instructions to fully automate this process via the Windows Task Scheduler.

Scripts aren’t your thing? We’ve got you covered with some recommended 3rd party add-ins that can bring this functionality to Outlook as well.

Continue reading: Schedule a recurring email with Outlook and PowerShell


Exchange 2019 CU7 and Exchange 2016 CU18

News

Cumulative Update 7 for Exchange 2019 is now available as well as Cumulative Update 18 for Exchange 2016

They both contain the same 14 documented new fixes or improvements, as well as all previously released fixes and security updates for their respective Exchange version and the latest DST updates. The CU for Exchange 2019 also includes an updated Sizing Calculator.

Notable improvements, changes and fixes are;

  • KB4570251: Inbox rule applying a personal tag doesn’t stamp RetentionDate.
  • KB4576650: Can’t add remote mailbox when setting email forwarding in Hybrid environment.
  • KB4570247: CSV log of Discovery export fails to properly escape target path field.
  • KB4570254: MSExchangeMapiMailboxAppPool causes prolonged 100% CPU.
  • KB4563416: Can’t view Online user free/busy status.
  • KB4576651: Can’t join Teams meetings from Surface Hub devices.
  • KB4577352: Description of the security update for Microsoft Exchange Server 2019 and 2016: September 8, 2020.

This release includes no new updates to the Active Directory Schema.
The next planned quarterly update is in December 2020.

Exchange 2019: CU7 KB4571787VLSC Download
Exchange 2016: CU18 KB4571788DownloadUM Language Pack
View: Blog post of the Exchange Team about CU7 for Exchange Server 2019 and CU 18 for Exchange 2016.


S/MIME support for Outlook on the Web (OWA) in Google Chrome or Microsoft Edge

S/MIME buttonS/MIME support for Outlook on the Web (OWA) used to be only available in Internet Explorer but it is now also possible to add this to Google Chrome and the new Microsoft Edge browser.

However, adding the required extension isn’t (currently) possible via the traditional means of using the Chrome Web Store or the Microsoft Edge Addons page.

This guide explains how you can manually install or deploy the Microsoft S/MIME Control for Outlook on the web.

Continue reading: S/MIME support for Outlook on the Web (OWA) in Google Chrome or Microsoft Edge


Executing PowerShell Scripts FAQ and Tips & Tricks

PowerShell Script buttonThere are several guides containing PowerShell scripts on HowTo-Outlook.com. PowerShell is a powerful scripting language which can be used by many applications including Outlook and Exchange. For end-user usage, it can be seen as the successor of vbs and batch scripts.

PowerShell scripts are easy to use but there are a couple of things to be aware of, especially when it is the first time you use such scripts.

This guide contains frequently asked questions regarding the use of PowerShell scripts and some additional tips and tricks to get you started.

Continue reading: Executing PowerShell Scripts FAQ and Tips & Tricks


Exchange 2013 CU23

News

Cumulative Update 23 for Exchange 2013 is now available. It contains 1 documented security update and 1 additional documented new fix or improvement, as well as all previously released fixes and security updates for Exchange 2013 and the latest DST updates. Note that mainstream support for Exchange 2013 has ended in April 2018.

  • KB4502131: “TLS negotiation failed with error UnknownCredentials” error after updating TLSCertificateName on Office 365 send connector in Exchange Server 2013 hybrid environment
  • KB4503028 which discusses ADV190018: Microsoft Exchange Server Defense in Depth Update. This update was released separately for CU22 as well.

This release includes no new updates to the Active Directory Schema.

Download: Cumulative Update 23 for Exchange Server 2013 (KB4489622)
Download: Exchange Server 2013 CU23 UM Language Packs
View: Description of Cumulative Update 23 for Exchange Server 2013
View: Blog post of the Exchange Team about CU23 for Exchange Server 2013


Importing eml-files into Outlook

Import EML buttonIf you’ve ever used Outlook Express, Windows (Live) Mail, Thunderbird, Lotus/IBM Notes or basically any mail client other then Outlook, chances are that you have some eml-files stored somewhere as well.

While Outlook does support opening eml-files, it doesn’t offer a way to import them into Outlook.

This guides contains instructions and 2 scripts to import eml-files into an Outlook folder of your choice.

Continue reading: Importing eml-files into Outlook


7 Tips to prevent your Calendar from crashing or becoming out-of-sync

Healthy Calendar buttonFor many, the Calendar in Outlook is a crucial part of their day and for future planning. To make sure you can rely on it, there are a couple of do’s and don’ts.

Especially when it comes to the handling of meeting requests, or when having delegates assigned to your Calendar, or when you are a delegate yourself, there are a couple of important things to be aware of.

Failing to do so, could cause your Calendar to become out-of-sync or produce corruptions which can cause Outlook to crash whenever you try to do anything with your Calendar.

Continue reading: 7 Tips to prevent your Calendar from crashing or becoming out-of-sync


Color Code your Emails, Calendar or Tasks automatically with Conditional Formatting

Conditional Formatting buttonThe Conditional Formatting feature in Outlook allows you to get organized by automatically color coding your Emails, Calendar items, Contacts and Tasks without the need to apply a Color Category to it or move them to different folders.

The color coding isn’t just intended to emphasize certain emails but it can also be used to deemphasize certain emails such as newsletters or emails you are only a CC or BCC recipient of.

You may actually already know Conditional Formatting without realizing it as it is for instance also being used to:

  • Show unread emails in a blue and bold font.
  • Show expired emails and completed tasks in a grey and strikethrough font.
  • Show overdue emails and tasks in a red font.

The “Conditional Formatting” feature may look complex at first but creating color coding rules is actually fairly easy and quite powerful when used the right way.

This guide will help you on your way to get yourself familiar with the Conditional Formatting options with 8 color coding examples which might be useful to you as well.

Conditional Formatting usage in the Message List.
Conditional Formatting usage in the Message List.

Continue reading: Color Code your Emails, Calendar or Tasks automatically with Conditional Formatting


Imported IMAP folders are not visible or don’t show any content

IMAP Folders buttonWhen you’ve exported your IMAP mailbox or specific folders to a pst-file which you then later open in Outlook or import into an Exchange or Outlook.com mailbox, you may be shocked to see that these folders don’t contain anything.

Additionally, when you configure this mailbox on a smartphone or tablet as an Exchange ActiveSync account, these folders may not show at all.

Luckily, this can be fixed without any data loss but the process to do so via MFCMAPI is not for the faint of heart or when you have many folder to fix.

Therefor, this guide also contains a script which you can run to apply the fix for you. You can either fix a single folder, a folder and its subfolders or your entire mailbox at once.

Continue reading: Imported IMAP folders are not visible or don’t show any content


Downloading Outlook 2013 from Office 365 after March 1, 2017

Download Office buttonSupport for the Office 2013 versions of Office 365 has ended and are no longer being offered for download in the download sections of Office 365 Home and Office 365 for Business.

If you still have it installed, you will receive Security Updates until April 10, 2023.

Upgrading to Office 2016 is highly recommended and also already part of your Office 365 subscription. However, common reasons why you might still need Office/Outlook 2013 are;

When you still need to (re-)install Office 2013 as part of Office 365 for whatever reason, you can still download it by using a direct link or by using the Office 2013 Deployment Tool.

Continue reading: Downloading Outlook 2013 from Office 365 after March 1, 2017


Autodiscover: Some quick methods to get it working

Autodiscover.xml buttonThe Autodiscover service is a required service for Outlook-Exchange connectivity since Outlook 2007 and Exchange 2007 but for whatever reason, in some Exchange environments this still hasn’t been implemented correctly.

In some part, this was due to the fact that you could still get basic Outlook-Exchange connectivity by using some legacy Exchange 2003 RPC over HTTP dialog in Outlook. This (unsupported) method now no longer works in Outlook 2016, Outlook 2019 and Outlook for Office 365 due to the removal of this legacy dialog since Outlook doesn’t support Exchange 2003 anymore since Outlook 2013.

Unfortunately, this leaves up-to-date Outlook users disconnected when Autodiscover hasn’t been provisioned correctly by your company.

This guide contains some reasonably quick and easy and some less elegant methods for end-users but also for Exchange administrators to get your Outlook connected to Exchange again. All discussed solutions are fully supported configurations by Microsoft and do not require any changes to Exchange or the need for a new SSL Certificate.

Continue reading: Autodiscover: Some quick methods to get it working


New and Changed in Outlook 2016

Outlook 2016 buttonUpgrading to Outlook 2016 from Outlook 2013 is easy and you’d probably need very little time to adjust yourself to it. In fact, if it wasn’t for the new default “colorful” theme, you’d hardly notice the upgrade to Outlook 2016 at first sight.

This is actually part of the Office 365 strategy where major new features are also introduced during the main lifetime of the current version, as we saw with Office 2013. In the old strategy, these features were held back for the new version. Office 2016 will get the same treatment so future updates can introduce new features as well.

Until then, there are still plenty of new features in Outlook 2016 to use and discover.

Continue reading: New and Changed in Outlook 2016


Upgrading to Outlook 2016

Outlook 2016 iconPlanning to upgrade to Outlook 2016? This guide contains a lot of preparation and other information to get yourself ready to ensure a smooth transition

Aside from the preparation steps, this guide informs you about what to expect when you start Outlook 2016 for the first time after you upgraded and how to troubleshoot several issues you may encounter during or after the installation.

Continue reading: Upgrading to Outlook 2016


Windows 10 (20H2 / October 2020 Update or earlier) and Outlook

Windows 10 buttonThinking about upgrading your computer to Windows 10 or are you using Outlook on a Windows 10 computer already and are being offered a major Windows 10 update?

What should you be aware of when you heavily rely on Outlook?

The upgrade process from Windows 7 and Windows 8 is actually quite streamlined and trouble free for most configurations. Things are even easier when applying a major update to Windows 10. However, for either upgrade, there are still a couple of attention points before you start.

This guide contains not only upgrade preparation and troubleshooting steps but also various tips about the changes that you could encounter involving Outlook after upgrading to Windows 10.

Continue reading: Windows 10 (20H2 / October 2020 Update or earlier) and Outlook


Outlook can’t connect to Gmail: Password incorrect

Gmail buttonWhen configuring your Gmail account in Outlook (or other mail clients such as Thunderbird and Mail apps on (older) smartphones), you may run into continuous password prompts or sync errors.

This is because Google has turned off Basic Authentication by default for all new accounts and accounts which haven’t synced within the last 30 days and only lets you authenticate via the OAuth 2.0 standard.

As a result, you’ll get Send/Receive errors (0x800CCC0E) and could get prompted for your Gmail password again in Outlook and the login could fail even when you supply the correct password.

Continue reading: Outlook can’t connect to Gmail: Password incorrect


Outlook for Microsoft 365 Apps Feature Update for October 2020

News

Microsoft released the October feature update of Outlook for Microsoft 365 Apps in the Current Channel (previously known as the Office 365 Monthly Channel).

It comes with 2 new features for Outlook and 5 highlighted fixes. It also includes the 3 fixes included in last week’s bug fix for Version 2009. The new features and fixes are listed below;

  • Insert your iPhone photos directly into Office
    HEIC pictures from your phone now insert seamlessly into Office. No conversion required.
  • Grammar checking’s got your back
    Outlook marks grammar errors as you type, so you can apply suggestions with a single click. There is an off switch for this as well.
  • We fixed an issue that caused the headers of Chinese messages to be unreadable when replying or forwarding.
  • We fixed an issue that caused Chinese characters to get changed to question marks when saving as an OFT file.
  • We fixed an issue that caused Outlook to create a second empty signature for people who had cloud settings enabled.
  • We fixed an issue that caused Cloud Settings not to be turned on for users by default.
  • We fixed an issue that caused changes to a user’s signature to fail to save.
  • We fixed an issue that caused users to be unable to grant Editor permission to their delegates.
  • We fixed an issue that caused users to experience the application to terminate unexpectedly when selecting a search result.

Note: Depending on your installation type, this update can be installed via the Update Now button in Outlook or the Microsoft Store and updates Outlook to: Version 2010 (Build 13328.20292).


Outlook 2016 / 2019 / 365 Update for October 2020

News

A new rollup update has been made available for all Click-to-Run installations of Outlook 2016, Outlook 2019 and Outlook as part of a Microsoft 365 subscription.

It contains 13 security updates for Access (1), Excel (3), Outlook (2), Word (1) and Office (6).

The Details about the Outlook vulnerabilities;

  • CVE-2020-16947: Microsoft Outlook Remote Code Execution Vulnerability
    A remote code execution vulnerability exists in Microsoft Outlook when the software fails to properly handle objects in memory. An attacker who successfully exploited the vulnerability could run arbitrary code in the context of the current user. Users whose accounts are configured to have fewer user rights on the system could be less impacted than users who operate with administrative user rights.
    To exploit the vulnerability, a user must open a specially crafted file with an affected version of Microsoft Outlook software. In an email attack scenario, an attacker could exploit the vulnerability by sending the specially crafted file to the user and convincing the user to open the file.
    Note that the Preview Pane is an attack vector for this vulnerability.
    The security update addresses the vulnerability by correcting how Microsoft Outlook handles files in memory.
  • CVE-2020-16949: Microsoft Outlook Denial of Service Vulnerability
    A denial of service vulnerability exists in Microsoft Outlook software when the software fails to properly handle objects in memory. An attacker who successfully exploited the vulnerability could cause a remote denial of service against a system.
    Exploitation of the vulnerability requires that a specially crafted email be sent to a vulnerable Outlook server.
    The security update addresses the vulnerability by correcting how Microsoft Outlook handles objects in memory.

In addition, it contains no documented non-security fixes for Outlook Current Version 2009 (but there were 3 fixes last week), 2 features and 15 fixes for Monthly Enterprise 2008 and 4 fixes for Semi-Annual (Preview) Version 2008. Most notable are;

  • Version 2008 – Create polls in Outlook with Quick Poll
    Easily create a poll, collect votes, and view results within an email. 
  • Version 2008 – New profile card for Outlook
    New profile card for Outlook including a better Organization view and matches the card style of Outlook Web.
  • Version 2009
    Addresses an issue that caused some users to observe Outlook unexpectedly starting in an offline state.
  • Version 2008
    Addresses an issue that caused users to be unable to close shared calendars by clicking on the “X” in the corner.
  • Version 2008
    Fixes an issue that caused users to see anomalies when using the compact view.
  • Version 2008
    Addressed an issue that caused meetings to fail to be removed from a manager’s calendar when declined by a delegate in some circumstances.

Based on your release channel, you’ll be updated to the following version;

  • Microsoft 365 Apps, Outlook 2016 Retail, Outlook 2019 Retail
    Version 2009 (Build 13231.20390)
  • Monthly Enterprise
    Version 2008 (Build 13127.20638)
    Version 2007 (Build 13029.20708)
  • Semi-Annual Enterprise (Preview)
    Version 2008 (Build 13127.20638)
  • Semi-Annual Enterprise
    Version 2002 (Build 12527.21236)
    Version 1908 (Build 11929.20966) 
  • Outlook 2019 Volume License
    Version 1808 (Build 10367.20048)

Note: Depending on your installation type, this update can be installed via the Update Now button in Outlook itself or the Microsoft Store. This update does not apply to msi-based installations of Office 2016.


Outlook 2016 (MSI) Security Update for October 2020

News

A Security Update has been released for Outlook 2016. It resolves the following vulnerability;

  • CVE-2020-16949: Microsoft Outlook Denial of Service Vulnerability
    A denial of service vulnerability exists in Microsoft Outlook software when the software fails to properly handle objects in memory. An attacker who successfully exploited the vulnerability could cause a remote denial of service against a system.
    Exploitation of the vulnerability requires that a specially crafted email be sent to a vulnerable Outlook server.
    The security update addresses the vulnerability by correcting how Microsoft Outlook handles objects in memory.

This update contains 4 additional fixes or improvements for non-security issues;

  • Fixes an issue that causes Outlook to intermittently crash when users interact with calendar items.
  • Fixes an issue to correctly block users from being able to forward multiple selected messages that have the “Do Not Forward” policy applied.
  • Fixes an issue in which the “LegacyExchangeDN” value for an email sender is preserved and displayed in the “From” field after a draft of the email is moved from a mailbox that has assistant permissions to the manager’s mailbox.
  • Fixes an issue that causes the computers of some users to fail when they connect through MAPI/HTTP.

View: Download information for KB4486671

Note: This update can be installed via Microsoft Update and updates Outlook to version 16.0.5071.1000. This update does not apply to Perpetual and Office 365 based installations of Office 2016.