def METHOD_NAME(network_virtual_appliance_name: Optional[str] = None,
                               resource_group_name: Optional[str] = None,
                               site_name: Optional[str] = None,
                               opts: Optional[pulumi.InvokeOptions] = None) -> AwaitableGetVirtualApplianceSiteResult:
    """
    Gets the specified Virtual Appliance Site.
    :param str network_virtual_appliance_name: The name of the Network Virtual Appliance.
    :param str resource_group_name: The name of the resource group.
    :param str site_name: The name of the site.
    """
    __args__ = dict()
    __args__['networkVirtualApplianceName'] = network_virtual_appliance_name
    __args__['resourceGroupName'] = resource_group_name
    __args__['siteName'] = site_name
    opts = pulumi.InvokeOptions.merge(_utilities.get_invoke_opts_defaults(), opts)
    __ret__ = pulumi.runtime.invoke('azure-native:network/v20230401:getVirtualApplianceSite', __args__, opts=opts, typ=GetVirtualApplianceSiteResult).value
    return AwaitableGetVirtualApplianceSiteResult(
        address_prefix=pulumi.get(__ret__, 'address_prefix'),
        etag=pulumi.get(__ret__, 'etag'),
        id=pulumi.get(__ret__, 'id'),
        name=pulumi.get(__ret__, 'name'),
        o365_policy=pulumi.get(__ret__, 'o365_policy'),
        provisioning_state=pulumi.get(__ret__, 'provisioning_state'),
        type=pulumi.get(__ret__, 'type'))