When using OneNote Web app and pasting in a block of text, the text box is created about 2 feet wide, scrolling off the screen to the right. If you scroll over to the right edge and try to resize the box by dragging it to the left, then the text itself, which was its original width, gets severely narrowed to the point it is unusable. 

To Reproduce, paste this block (or any similar) of text into OneNote web app, then notice the width of the text box and try to resize it:

Your organization’s attack surface includes all the places where an attacker could compromise your organization’s devices or networks. Reducing your attack surface means protecting your organization’s devices and network, which leaves attackers with fewer ways to perform attacks. Configuring attack surface reduction rules in Microsoft Defender for Endpoint can help!

Attack surface reduction rules target certain software behaviors, such as:

Launching executable files and scripts that attempt to download or run filesRunning obfuscated or otherwise suspicious scriptsPerforming behaviors that apps don’t usually initiate during normal day-to-day work

Such software behaviors are sometimes seen in legitimate applications. However, these behaviors are often considered risky because they’re commonly abused by attackers through malware. Attack surface reduction rules can constrain software-based risky behaviors and help keep your organization safe.

For a sequential, end-to-end process of how to manage attack surface reduction rules, see:

Attack surface reduction rules deployment overviewPlan attack surface reduction rules deploymentTest attack surface reduction rulesEnable attack surface reduction rulesOperationalize attack surface reduction rules

​When using OneNote Web app and pasting in a block of text, the text box is created about 2 feet wide, scrolling off the screen to the right. If you scroll over to the right edge and try to resize the box by dragging it to the left, then the text itself, which was its original width, gets severely narrowed to the point it is unusable.  To Reproduce, paste this block (or any similar) of text into OneNote web app, then notice the width of the text box and try to resize it:  Why attack surface reduction rules are importantYour organization’s attack surface includes all the places where an attacker could compromise your organization’s devices or networks. Reducing your attack surface means protecting your organization’s devices and network, which leaves attackers with fewer ways to perform attacks. Configuring attack surface reduction rules in Microsoft Defender for Endpoint can help!Attack surface reduction rules target certain software behaviors, such as:Launching executable files and scripts that attempt to download or run filesRunning obfuscated or otherwise suspicious scriptsPerforming behaviors that apps don’t usually initiate during normal day-to-day workSuch software behaviors are sometimes seen in legitimate applications. However, these behaviors are often considered risky because they’re commonly abused by attackers through malware. Attack surface reduction rules can constrain software-based risky behaviors and help keep your organization safe.For a sequential, end-to-end process of how to manage attack surface reduction rules, see:Attack surface reduction rules deployment overviewPlan attack surface reduction rules deploymentTest attack surface reduction rulesEnable attack surface reduction rulesOperationalize attack surface reduction rules  Read More

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