Policy
Define proxy auto-config (.pac) for connecting to the network
Windows 11 25H2
Policy overview
Key metadata and intent for this policy.
Supported OS tags: Windows10, Windows10RT, Windows11, WindowsServer2016
This policy setting defines the URL of a proxy .pac file that should be used when the client attempts to connect the network for security intelligence updates and MAPS reporting. If the proxy auto-config fails or if there is no proxy auto-config specified, the client will fall back to the alternative options (in order): 1. Proxy server (if specified) 2. Proxy .pac URL (if specified) 3. None 4. Internet Explorer proxy settings 5. Autodetect If you enable this setting, the proxy setting will be set to use the specified proxy .pac according to the order specified above. If you disable or do not configure this setting, the proxy will skip over this fallback step according to the order specified above.
Registry values
How enabled and disabled states update the registry.
No explicit registry values are set for enabled or disabled states.
Policy elements
Inputs and configuration options exposed by this policy.
| Element | Type | Registry mapping | Constraints & behavior |
|---|---|---|---|
Define proxy auto-config (.pac) for connecting to the network ID ProxyPacUrl | text | HKLM\Software\Policies\Microsoft\Windows Defender\ProxyPacUrl Type REG_SZ | None |
Other policies in this category
Explore related policies at the same level.
- ComputerAllow antimalware service to remain running alwaysAt least Windows Server 2012, Windows 8 or Windows RT
- ComputerAllow antimalware service to startup with normal priorityAt least Windows Server 2012, Windows 8 or Windows RT
- ComputerConfigure detection for potentially unwanted applicationsAt least Windows Server 2016, Windows 10 Version 1607
- ComputerConfigure local administrator merge behavior for listsAt least Windows Server 2012, Windows 8 or Windows RT
- ComputerConfigure scheduled task times randomization windowAt least Windows Server 2012, Windows 8 or Windows RT
- ComputerControl whether exclusions are visible to local usersAt least Windows Server 2016, Windows 10 Version 1607
- ComputerControl whether or not exclusions are visible to Local AdminsAt least Windows Server 2016, Windows 10 Version 1607
- ComputerDefine addresses to bypass proxy serverAt least Windows Server 2012, Windows 8 or Windows RT
- ComputerDefine proxy server for connecting to the networkAt least Windows Server 2012, Windows 8 or Windows RT
- ComputerDefine the directory path to copy support log filesAt least Windows Server 2016, Windows 10 Version 1607
- ComputerRandomize scheduled task timesAt least Windows Server 2012, Windows 8 or Windows RT
- ComputerSelect the channel for Microsoft Defender daily security intelligence updatesAt least Windows Server 2016, Windows 10 Version 1607