-> Microsoft Defender Antivirus doesn't use the static proxy to connect to Windows Update or Microsoft Update for downloading updates. Instead, it uses a system-wide proxy if configured to use Windows Update, or the configured internal update source according to the [configured fallback order](manage-protection-updates-microsoft-defender-antivirus.md). If necessary, you can use **Administrative Templates > Windows Components > Microsoft Defender Antivirus > Define proxy auto-config (.pac)** for connecting to the network. If you need to set up advanced configurations with multiple proxies, use **Administrative Templates > Windows Components > Microsoft Defender Antivirus > Define addresses** to bypass proxy server and prevent Microsoft Defender Antivirus from using a proxy server for those destinations.
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