Sensor failure communication error If you receive the following sensor failure error: System.Net.Http.HttpRequestException: An error occurred while sending the request. —> System.Net.WebException: Unable to connect to the remote server —> System.Net.Sockets.SocketException: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host […]
Sensor failure communication error If you receive the following sensor failure error: System.Net.Http.HttpRequestException: An error occurred while sending the request. —> System.Net.WebException: Unable to connect to the remote server —> System.Net.Sockets.SocketException: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host […]
Want to experience Defender for Endpoint? Sign up for a free trial. You might need to troubleshoot issues while pulling detections in your SIEM tools. This page provides detailed steps to troubleshoot issues you might encounter. Learn how to get a new client secret If your client secret expires or if you’ve misplaced the copy provided […]
Important The improved Microsoft 365 Defender portal is now available. This new experience brings Defender for Endpoint, Defender for Office 365, Microsoft 365 Defender, and more into the Microsoft 365 Defender portal. Learn what’s new. Applies to: Microsoft 365 Defender Important Some information relates to prereleased product which may be substantially modified before it’s commercially released. Microsoft makes […]
When you use attack surface reduction rules you may run into issues, such as: A rule blocks a file, process, or performs some other action that it shouldn’t (false positive) A rule doesn’t work as described, or doesn’t block a file or process that it should (false negative) There are four steps to troubleshooting these problems: Confirm […]
Tip Want to experience Defender for Endpoint? Sign up for a free trial. This article provides troubleshooting information for network protection, in cases, such as: Network protection blocks a website that is safe (false positive) Network protection fails to block a suspicious or known malicious website (false negative) There are four steps to troubleshooting these problems: Confirm […]
This section addresses issues that might arise as you use the Microsoft Defender for Endpoint service. Server error – Access is denied due to invalid credentials If you encounter a server error when trying to access the service, you’ll need to change your browser cookie settings. Configure your browser to allow cookies. Elements or data […]
When collaborating with Microsoft support professionals, you may be asked to use the client analyzer to collect data for troubleshooting of more complex scenarios. The analyzer script supports other parameters for that purpose and can collect a specific log set based on the observed symptoms that need to be investigated. Run ‘MDEClientAnalyzer.cmd /?‘ to see […]
The error codes listed in the following table may be returned by an operation on any of Microsoft Defender for Endpoint APIs. In addition to the error code, every error response contains an error message, which can help resolve the problem. The message is a free text that can be changed. At the bottom of […]
This topic provides some general steps that can be used to narrow down performance issues related to Microsoft Defender for Endpoint on macOS. Real-time protection (RTP) is a feature of Microsoft Defender for Endpoint on macOS that continuously monitors and protects your device against threats. It consists of file and process monitoring and other heuristics. […]