Outlook for Office 365 Feature Update for March 2020

News

Microsoft has just released the March feature update of Outlook for Office 365 (Monthly Channel) and it comes with 2 new features for Outlook and 1 highlighted fix.

  • Drag email to a group you own
    Move and copy messages and conversations by dragging them from your inbox. Messages you drag will be shared with all group members.
  • New experience for captive wifi networks
    Have you ever joined a wifi network that required a web page to sign in with? Outlook now detects this and helps you get connected. (Woohoo! Finally! :-) )
  • Addressed an issue that caused users to see the Outlook process lingering in task manager after exiting.

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 2003 (Build 12624.20320).


 


Exchange 2019 CU5

News

Cumulative Update 5 for Exchange 2019 is now available. It contains 2 security updates and 18 additional documented new fixes or improvements, as well as all previously released fixes and security updates for Exchange 2019 and the latest DST updates.

Notable improvements, changes and fixes are;

  • KB4552472: Exchange Server 2019 Sizing Calculator version 10.4 is available.
    Version 10.4 of the calculator includes improvements to the logic to detect whether a design is bound by mailbox size (capacity) or throughput (IOPs) which affects the maximum number of mailboxes a database will support.
  • KB4547719: MCDB status is “Offline” and SSDs are not formatted.
  • KB4547720: Partial word searches not working for mailboxes in Outlook online mode.
  • KB4547706: Birthday isn’t correctly synced to iOS native mail app.
  • KB4547711: Public folder permissions aren’t applied from Outlook.
  • KB4547713: IsOnlineMeeting is always false for Teams-only meetings.
  • KB4547723: Can’t sign in to Office 365 if configuring hybrid with Chrome SameSite Cookie enabled.
  • KB4536987: Description of the security update for Microsoft Exchange Server 2019 and 2016: February 11, 2020 which discusses CVE-2020-0692 and CVE-2020-0688. These updates were released separately for CU4 as well.

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

Download: Cumulative Update 5 for Exchange Server 2019 (KB4537677) (from MVLC)
View: Description of Cumulative Update 5 for Exchange Server 2019
View: Blog post of the Exchange Team about CU5 for Exchange Server 2019


Exchange 2016 CU16

News

Cumulative Update 16 for Exchange 2016 is now available. It contains 2 security updates and 13 additional documented new fixes or improvements, as well as all previously released fixes and security updates for Exchange 2016 and the latest DST updates.

Notable improvements, changes and fixes are;

  • KB4547706: Birthday isn’t correctly synced to iOS native mail app.
  • KB4547711: Public folder permissions aren’t applied from Outlook.
  • KB4547713: IsOnlineMeeting is always false for Teams-only meetings.
  • KB4547723: Can’t sign in to Office 365 if configuring hybrid with Chrome SameSite Cookie enabled.
  • KB4536987: Description of the security update for Microsoft Exchange Server 2019 and 2016: February 11, 2020 which discusses CVE-2020-0692 and CVE-2020-0688. These updates were released separately for CU15 as well.

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

Download: Cumulative Update 16 for Exchange Server 2016 (KB4537678) (not yet available at the time of writing)
Download: Exchange Server 2016 CU16 UM Language Packs (not yet available at the time of writing)
View: Description of Cumulative Update 16 for Exchange Server 2016
View: Blog post of the Exchange Team about CU16 for Exchange Server 2016


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Outlook 2016 / 2019 / 365 Update for March 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 an Office 365 subscription.

It contains 4 security updates for Word.

No fixes were mentioned for any of the Outlook versions but a new Semi-Annual (Targeted) version has been released (Version 2002) which will become the Semi-Annual version in July.

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

  • Office 365, Outlook 2016 Retail, Outlook 2019 Retail
    Version 2002 (Build 12527.20278)
  • Office 365 Semi Annual (Targeted)
    Version 2002 (Build 12527.20278)
  • Office 365 Semi Annual
    Version 1908 (Build 11929.20648)
    Version 1902 (Build 11328.20554) 
  • Outlook 2019 Volume License
    Version 1808 (Build 10357.20081)

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 installation of Office 2016.


Outlook 2016 (MSI) Update for March 2020

News

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

  • Fixes an issue that causes the user selection for the hash algorithm not to persist.
  • Fixes an issue that causes crashes when users run rules on certain email messages.
  • Fixes an issue in which Outlook sometimes crashes when you view calendar sharing requests by having “Read all standard mail in plain text” turned on.
  • When you send a meeting request that contains attachments, the attachments may be duplicated in the calendar items. This issue occurs when Outlook runs against an Office 365 account in Online mode.
  • Fixes an issue that causes Outlook to use an excessive amount of CPU when you view the calendar window and resize the window to a narrower size.
  • Fixes an issue that causes some users to experience a crash.

View: Download information for KB4462111

Note: This update can be installed via Microsoft Update and updates Outlook to version 16.0.4978.1000. This update does not apply to Perpetual and Office 365 based installations of Office 2016.


Exchange 2019 and 2016 Security Updates for March 2020

News

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

  • CVE-2020-0903: Microsoft Exchange Server Spoofing Vulnerability
    A cross-site-scripting (XSS) vulnerability exists when Microsoft Exchange Server does not properly sanitize a specially crafted web request to an affected Exchange server. An authenticated attacker could exploit the vulnerability by sending a specially crafted request to an affected server.
    The attacker who successfully exploited the vulnerability could then perform cross-site scripting attacks on affected systems and run script in the security context of the current user. The attacks could allow the attacker to read content that the attacker is not authorized to read, use the victim’s identity to take actions on the Exchange server on behalf of the user, such as change permissions and delete content, and inject malicious content in the browser of the user.
    The security update addresses the vulnerability by helping to ensure that Exchange Server properly sanitizes web requests.

View: Description of the security update for Microsoft Exchange Server 2019 and 2016: March 10, 2020
Download: Security Update For Exchange Server 2019 CU4 (KB4540123)
Download: Security Update For Exchange Server 2019 CU3 (KB4540123)
Download: Security Update For Exchange Server 2016 CU15 (KB4540123)
Download: Security Update For Exchange Server 2016 CU14 (KB4540123)


Outlook 2013 Security Update for February 2020

News

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

  • CVE-2020-0696: Microsoft Outlook Security Feature Bypass Vulnerability
    A security feature bypass vulnerability exists in Microsoft Outlook software when it improperly handles the parsing of URI formats. The security feature bypass by itself does not allow arbitrary code execution. However, to successfully exploit the vulnerability, an attacker would have to use it in conjunction with another vulnerability, such as a remote code execution vulnerability, to take advantage of the security feature bypass vulnerability and run arbitrary code.
    To exploit the vulnerability, an attacker would have to convince a user to open a specially crafted URI with an affected version of Microsoft Outlook software.
    The security update addresses the vulnerability by correcting how Microsoft Outlook handles the parsing of URI formats.

View: Download information for KB4484156

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 15.0.5215.1000.


Outlook 2010 Security Update for February 2020

News

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

  • CVE-2020-0696: Microsoft Outlook Security Feature Bypass Vulnerability
    A security feature bypass vulnerability exists in Microsoft Outlook software when it improperly handles the parsing of URI formats. The security feature bypass by itself does not allow arbitrary code execution. However, to successfully exploit the vulnerability, an attacker would have to use it in conjunction with another vulnerability, such as a remote code execution vulnerability, to take advantage of the security feature bypass vulnerability and run arbitrary code.
    To exploit the vulnerability, an attacker would have to convince a user to open a specially crafted URI with an affected version of Microsoft Outlook software.
    The security update addresses the vulnerability by correcting how Microsoft Outlook handles the parsing of URI formats.

View: Download information for KB4484163

Note: This update can be installed via Microsoft Update and updates Outlook to version 14.0.7245.5000.


Exchange 2019, 2016, 2013 and 2010 Security Updates for February 2020

News

Security updates have been released for Exchange 2010, Exchange 2013, Exchange 2016 and Exchange 2019.

  • CVE-2020-0688: Microsoft Exchange Validation Key Remote Code Execution Vulnerability
    A remote code execution vulnerability exists in Microsoft Exchange Server when the server fails to properly create unique keys at install time.
    Knowledge of a the validation key allows an authenticated user with a mailbox to pass arbitrary objects to be deserialized by the web application, which runs as SYSTEM.
    The security update addresses the vulnerability by correcting how Microsoft Exchange creates the keys during install.
  • CVE-2020-0692: Microsoft Exchange Server Elevation of Privilege Vulnerability
    An elevation of privilege vulnerability exists in Microsoft Exchange Server. An attacker who successfully exploited this vulnerability could gain the same rights as any other user of the Exchange server. This could allow the attacker to perform activities such as accessing the mailboxes of other users.
    Exploitation of this vulnerability requires Exchange Web Services (EWS) to be enabled and in use in an affected environment. To exploit the vulnerability, an attacker would need to change parameters in the Security Access Token and forward it to a Microsoft Exchange Server, thereby allowing impersonation of another Exchange user.
    To address this vulnerability, Microsoft has changed the way EWS handles these tokens.
    This vulnerability does not apply to Exchange 2010.

The updates for Exchange 2010 and Exchange 2013 also contain the following fix;

  • KB4540267: MSExchangeDelivery.exe or EdgeTransport.exe crashes in Exchange Server 2013 and Exchange Server 2010

View: Description of the security update for Microsoft Exchange Server 2019 and 2016: February 11, 2020
View: Description of the security update for Microsoft Exchange Server 2013: February 11, 2020
View: Description of the security update for Microsoft Exchange Server 2010: February 11, 2020
Download: Security Update For Exchange Server 2019 Cumulative Update 4 (KB4536987)
Download: Security Update For Exchange Server 2019 Cumulative Update 3 (KB4536987)
Download: Security Update For Exchange Server 2016 Cumulative Update 15 (KB4536987)
Download: Security Update For Exchange Server 2016 Cumulative Update 14 (KB4536987)
Download: Security Update For Exchange Server 2013 CU23 (KB4536988)
Download: Update Rollup 30 for Exchange Server 2010 SP3 (KB4536989)


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


First look at the new Outlook for Windows interface with a simplified Ribbon

News

Microsoft has released a blog post and a video in which it explains and shows off the design changes that will be coming to Office.com and Office 365.

One of the major visible changes is the new simplified Ribbon. Instead of having a large button or up to 3 smaller buttons on top of each other, the updated Ribbon contains only 1 line of command icons on each of the Ribbon tabs.

Preview of the new single line command bar in Outlook.
Preview of the new single line command bar in Outlook. (captured from the video linked below)

This redesign allows for a cleaner interface with the commands which matter the most and with more vertical screen space left for the actual content that you are working on.

There will also be an option to expand the Ribbon to return the “classic” three-line layout in case you don’t like the change, want to decide for yourself when you are ready to change or when you simply want to dedicate more screen space to the available commands.

Microsoft will start rolling out this new experience in Outlook for Desktop to a select amount of Insiders in July.

View: Power and simplicity – updates to the Office 365 user experience
View: Updates to the Microsoft Office user experience (video)


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 (1909 / November 2019 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 (1909 / November 2019 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 Office 365 Feature Update for February 2020

News

Microsoft has just released the February feature update of Outlook for Office 365 (Monthly Channel) and it comes with 1 new feature for Outlook and 6 fixes.

  • Updates to the Outlook Folder Pane
    The new folder list that is coming with Aesthetic v1 will have an update look & feel and Groups will be elevated to the same hierarchy as Folders and Favorites.
  • Addresses an issue that caused commas in the location field of a meeting to turn into semicolons.
  • Addresses an issue that could result in a crash when viewing the same item in multiple windows.
  • Addresses an issue that caused the option to disable flagged item highlighting to fail to be respected in some scenarios.
  • Addresses an issue that caused Outlook to unexpectedly sync all mail even when the sync slider is set to a smaller setting.
  • Addresses an issue that caused users with Black Theme to see the “From” dropdown show white text on a white background.
  • This change restores the ability to view multi-line subjects in the message header.

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 2002 (Build 12527.20194).


Outlook 2016 / 2019 / 365 Update for February 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 an Office 365 subscription.

It contains 3 security updates for Outlook (1), Excel (1) and Office (1). Details about the Outlook vulnerabilities;

  • CVE-2020-0696: Microsoft Outlook Security Feature Bypass Vulnerability
    A security feature bypass vulnerability exists in Microsoft Outlook software when it improperly handles the parsing of URI formats. The security feature bypass by itself does not allow arbitrary code execution. However, to successfully exploit the vulnerability, an attacker would have to use it in conjunction with another vulnerability, such as a remote code execution vulnerability, to take advantage of the security feature bypass vulnerability and run arbitrary code.
    To exploit the vulnerability, an attacker would have to convince a user to open a specially crafted URI with an affected version of Microsoft Outlook software.
    The security update addresses the vulnerability by correcting how Microsoft Outlook handles the parsing of URI formats.

In addition, it contains 2 documented non-security fixes for Outlook Monthly, 6 for Semi-Annual 1908 (including Targeted) and 1 for Semi-Annual 1902. Most notable fixes are;

  • Monthly: Addresses an issue that caused users to experience a crash when canceling account setup.
  • Monthly and Semi-Annual 1908: Addresses an issue that caused users to experience a crash when specifying an invalid From address.
  • Semi-Annual 1908: Addresses an issue that caused users to have problems problems with shared calendar folders syncing to the OST, resulting in permission errors when they try to interact with these folders.
  • Semi-Annual 1908: Addressed an issue that caused users to experience a hang at the Loading Profile screen when Outlook is starting up.
  • Semi-Annual 1902: Addresses an issue that caused users to encounter encryption algorithm is not supported errors when sending an encrypted email.

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

  • Office 365, Outlook 2016 Retail, Outlook 2019 Retail
    Version 2001 (Build 12430.20264)
  • Office 365 Semi Annual (Targeted)
    Version 1908 (Build 11929.20606)
  • Office 365 Semi Annual
    Version 1908 (Build 11929.20606)
    Version 1902 (Build 11328.20526)
    Version 1808 (Build 10730.20438)
  • Outlook 2019 Volume License
    Version 1808 (Build 10356.20006)

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 installation of Office 2016.


Outlook 2016 (MSI) Security Update for February 2020

News

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

  • CVE-2020-0696: Microsoft Outlook Security Feature Bypass Vulnerability
    A security feature bypass vulnerability exists in Microsoft Outlook software when it improperly handles the parsing of URI formats. The security feature bypass by itself does not allow arbitrary code execution. However, to successfully exploit the vulnerability, an attacker would have to use it in conjunction with another vulnerability, such as a remote code execution vulnerability, to take advantage of the security feature bypass vulnerability and run arbitrary code.
    To exploit the vulnerability, an attacker would have to convince a user to open a specially crafted URI with an affected version of Microsoft Outlook software.
    The security update addresses the vulnerability by correcting how Microsoft Outlook handles the parsing of URI formats.

This update also contains 3 additional fixes or improvements for non-security issues;

  • Adds the ability to prevent Outlook from connecting to a mailbox that uses basic authentication by using the DisableBasic registry key.
  • Large blank spaces appear between the first and second columns in the contact item after an East Asian language pack is applied to Outlook.
  • Outlook may stop responding when you create a rule from a Skype for Business “missed conversation” message.

View: Download information for KB4484250

Note: This update can be installed via Microsoft Update and updates Outlook to version 16.0.4966.1000. This update does not apply to Perpetual and Office 365 based installations of Office 2016.