Windows 10: Microsoft Defender SmartScreen is blocking access to business OneDrive Site

netblindpaul · Sep 6, 2022

When I try to access my business OneDrive site from my home computer, Microsoft Defender SmartScreen in Edge blocks the access telling me that the site is suspicious and may be looking to steal information.There are no blocks or settings on the business OneDrive side that stop me from accessing the site through this means, and it used to work fine, but a few months ago, it just started to put up this red warning window, which means I must go through clicking several times to get to the OneDrive.I don't want to turn SmartScreen off completely, and I don't recall exactly when it started.I have,

:)

crionsynx · Sep 6, 2022

Microsoft Defender Smartscreen

Hi COLINGILBERT1,

Sorry to hear you're experiencing this issue. I'm an Independent Advisor and consumer of Microsoft products just like you. Let me help you with your concern.

Microsoft Defender SmartScreen checks downloaded files against a list of reported malicious software sites and known unsafe programs and against list of files that are well known and downloaded by many Windows users. If the file you downloaded is on the malicious
list or is not commonly downloaded it will show a warning, advising caution. If you believe that the file is not malicious and you trust the source then you can ignore the warning by clicking "Run anyway".

Refer to the below link for the benefits of Microsoft Defender SmartScreen.

https://docs.microsoft.com/en-us/windows/securi...

WilliamYijieWang · Sep 6, 2022

My website has been blocked by Edge Windows Defender SmartScreen

My domain name has been blocked by Edge for a really long time. Every time I tried to accessed it, it is always blocked by Windows Defender SmartScreen saying it has been reported as unsafe.

My business partner and I tried to report it as safe many times but it is still blocked. And it has been really hard to get people from Microsoft on the phone to solve this issue.

Brink · Sep 6, 2022

Windows Defender SmartScreen - File and Flash Player blockage problem

SmartScreen has become a part of Windows 10 OS, it was named as Windows Defender SmartScreen. It is useful to protect not just Edge, Internet Explorer browsers but also other applications such as third-party browsers, Email Client and Apps from malicious Web link attack, malicious Web download threat. Let us have a quick look into SmartScreen functionalities:

Anti-phishing and anti-malware support. Microsoft Defender SmartScreen helps to protect users from sites that are reported to host phishing attacks or attempt to distribute malicious software.

Prevent drive-by attacks. Drive-by attacks are web-based attacks that tend to start on a trusted site, targeting security vulnerabilities in commonly used software. Because drive-by attacks can happen even if the user does not click or download anything on the page, the danger often goes unnoticed.

Reputation-based URL and app protection. Microsoft Defender SmartScreen evaluates a website's URLs to determine if they're known to distribute or host unsafe content. It also provides reputation checks for apps, checking downloaded programs and the digital signature used to sign a file. If a URL, a file, an app, or a certificate has an established reputation, users won't see any warnings. If, however, there's no reputation, the item is marked as a higher risk and presents a warning to the user.

Improved heuristics and diagnostic data. Microsoft Defender SmartScreen is constantly learning and endeavoring to stay up to date, so it can help to protect you against potentially malicious sites and files.

Blocking URLs associated with potentially unwanted applications.  Software that can cause your machine to run slowly, display unexpected ads, or at worst, install other software

Website blacklist block example:

App blocked by Defender SmartScreen example:

Starting with Windows 10 version 1703 to 2004 you will configure SmartScreen directly by Windows Defender SmartScreen GPO (not through Edge GPO anymore):Administrative Templates\Windows Components\Windows Defender SmartScreen\Microsoft Edge

Submit File for Whitelisting to Microsoft Security Intelligence

You may experience false positive block or warning by Defender SmartScreen when accessing in-house Web App’s URL or Website URLs and you need to whitelist those URLs.

General rule, there will usually be a direct link in the product app notification for error reporting to Microsoft Security Support. In case of Defender SmartScreen, the link shown in the notification as seen here:

You should provide the information to the Defender SmartScreen Support Team if your Site gets a false-positive alarm of blockage or gets a false positive warning of unknow web site, ..., the following screenshot shown the report's content:

For download block or download warning report of false-positive, you could manually submit the sample files by accessing the WDSI Website and choose to submit as an enterprise user or a developer user. (You could also submit file as a home user too.)

To submit file, browse to : https://www.microsoft.com/en-us/wdsi/filesubmission

To upload sample file with size more than 500MB, you could compress it by Zip or RAR archive.

You could report file for Blacklist to block access to it or report file for Whitelist to allow access.

You could submit filtering request for almost any of Microsoft’s software and service as per the dropped down list of the above Form:

Microsoft goal is to minimize false warnings or blocks. In the rare case of a false warning, Microsoft offered a web-based feedback system to help users and website owners report any errors as quickly as possible. These reports are verified by the support team and mistakes are corrected. Enterprise Premier Customer will get the highest priority in response time.

Flash Player should be removed from the Sites after December 2020

Adobe will end support of Flash Player on December 31, 2020.

In Microsoft Edge Chromium, Flash will be disabled by default. However, users may re-enable it on a site-by-site basis.

Flash will not be disabled by default from Microsoft Edge classic (Edge legacy) or Internet Explorer 11 prior to its removal by December of 2020.

Group policies are available for enterprise admins and IT pros to change the Flash behavior

Flash will be completely removed from all browsers by December 31, 2020, via Windows Update.  Companies reliant on Flash for development and playback of content are encouraged to remove the dependency on Adobe Flash prior to December 2020.

Reference:

https://docs.microsoft.com/en-us/windows/security/threat-protection/microsoft-defender-smartscreen/m...

https://docs.microsoft.com/en-us/windows/security/threat-protection/windows-defender-smartscreen/win...

Available Microsoft Defender SmartScreen Group Policy and mobile device management (MDM) settings.

Detect and block potentially unwanted applications

Click to expand...

Source: https://techcommunity.microsoft.com/...e/ba-p/2066746

Turn On or Off SmartScreen for Apps and Files from Web in Windows 10

Turn On or Off SmartScreen for Microsoft Edge in Windows 10

Turn On or Off SmartScreen for Microsoft Store Apps in Windows 10

Windows 10: Microsoft Defender SmartScreen is blocking access to business OneDrive Site

Microsoft Defender SmartScreen is blocking access to business OneDrive Site

Microsoft Defender SmartScreen is blocking access to business OneDrive Site

Microsoft Defender SmartScreen is blocking access to business OneDrive Site

Microsoft Defender SmartScreen is blocking access to business OneDrive Site - Similar Threads - Microsoft Defender SmartScreen

Microsoft Defender SmartScreen - where to get the blocking reasons

Microsoft Defender SmartScreen - where to get the blocking reasons

Microsoft Defender SmartScreen - where to get the blocking reasons

Microsoft Defender SmartScreen

Microsoft Defender SmartScreen

Microsoft Defender SmartScreen is blocking access to business OneDrive Site

Microsoft Defender SmartScreen is blocking access to business OneDrive Site

Microsoft Defender smartscreen unwanted blocking of app

Microsoft Defender Smartscreen