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Merge pull request #2442 from MicrosoftDocs/repo_sync_working_branch

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Confirm merge from repo_sync_working_branch to master to sync with https://github.com/MicrosoftDocs/windows-itpro-docs (branch public)
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Tina Burden
2020-04-02 09:28:03 -07:00
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windows/security/threat-protection/microsoft-defender-atp/troubleshoot-live-response.md
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@ -52,5 +52,14 @@ If while trying to take an action during a live response session, you encounter
4. Navigate to your TEMP folder.
5. Run the action you wanted to take on the copied file.
## Slow live response sessions or delays during initial connections
Live response leverages Microsoft Defender ATP sensor registration with WNS service in Windows.
If you are having connectivity issues with live response, please confirm the following:
1. `notify.windows.com` is not blocked in your environment. For more information see, [Configure machine proxy and Internet connectivity settings](configure-proxy-internet.md#enable-access-to-microsoft-defender-atp-service-urls-in-the-proxy-server).
2. WpnService (Windows Push Notifications System Service) is not disabled.
Please refer to the articles below to fully understand the WpnService service behavior and requirements:
- [Windows Push Notification Services (WNS) overview](https://docs.microsoft.com/windows/uwp/design/shell/tiles-and-notifications/windows-push-notification-services--wns--overview)
- [Enterprise Firewall and Proxy Configurations to Support WNS Traffic](https://docs.microsoft.com/windows/uwp/design/shell/tiles-and-notifications/firewall-allowlist-config)
- [Microsoft Push Notifications Service (MPNS) Public IP ranges](https://www.microsoft.com/en-us/download/details.aspx?id=44535)