Set-BluetoothMDM.ps1

<#
    This script allows modification of local MDM policies.
    It is based on Microsoft Documentation: https://docs.microsoft.com/en-us/windows/client-management/mdm/using-powershell-scripting-with-the-wmi-bridge-provider
    Author: Cornelius Schuchardt, SoftEd Systems GmbH
#>

$namespaceName = "root\cimv2\mdm\dmmap"
$className = "MDM_Policy_Config01_Bluetooth02"
$instance = "Bluetooth"
$property = "AllowDiscoverableMode"
$value = 0

# Enumerate all instances available for classname
$obj = Get-CimInstance -Namespace $namespaceName -ClassName $className
if (-not ($obj)) {
    New-CimInstance -Namespace $namespaceName -ClassName $className -Property @{ParentID="./Vendor/MSFT/Policy/Config";InstanceID=$instance;AllowAdvertising=$value}
}
else {
    $currentValue = $obj.$property
    if ($currentValue -eq $value) {
        Write-Verbose "MDM setting is in consistent state: $property is $value"
    }
    else {
        Write-Verbose "MDM setting must be changed: $property is $currentValue; Should be $value"
        $obj.$property=$value
        Set-CimInstance -CimInstance $obj
    }
}

$namespaceName = "root\cimv2\mdm\dmmap"
$className = "MDM_Policy_Config01_Bluetooth02"
$instance = "Bluetooth"
$property = "AllowAdvertising"
$value = 0

# Enumerate all instances available for classname
$obj = Get-CimInstance -Namespace $namespaceName -ClassName $className
if (-not ($obj)) {
    New-CimInstance -Namespace $namespaceName -ClassName $className -Property @{ParentID="./Vendor/MSFT/Policy/Config";InstanceID=$instance;AllowAdvertising=$value}
}
else {
    $currentValue = $obj.$property
    if ($currentValue -eq $value) {
        Write-Verbose "MDM setting is in consistent state: $property is $value"
    }
    else {
        Write-Verbose "MDM setting must be changed: $property is $currentValue; Should be $value"
        $obj.$property=$value
        Set-CimInstance -CimInstance $obj
    }
}