Reboot Notification / Setting WMI Methode Propertys

PowerShell Help
1

Goal:

Reboot a remote (W7-client with PSv5) computer and notify the currently logged on user and show a countdown in minutes.

Restrictions:
only WMI or Registry ( Powershell Remoting will only work 90% of the time )

What I have tried to do:
I would like leverage the build in SCCM client functionality with give’s a nice user experience.
Only I got stuck at changing the WMI Properties.
This command (Methode) give’s the reboot Status:

$Status = Invoke-WmiMethod -Namespace "ROOT\ccm\ClientSDK" -Class CCM_ClientUtilities -Name DetermineIfRebootPending -EnableAllPrivileges  
$Status
__GENUS             : 1
__CLASS             : __PARAMETERS
__SUPERCLASS        : 
__DYNASTY           : __PARAMETERS
__RELPATH           : __PARAMETERS
__PROPERTY_COUNT    : 7
__DERIVATION        : {}
__SERVER            : MyPSComputer
__NAMESPACE         : ROOT\ccm\ClientSDK
__PATH              : \\ MyPSComputer\ROOT\ccm\ClientSDK:__PARAMETERS
DisableHideTime     : 19700101010000.000000+000
InGracePeriod       : False
IsHardRebootPending : False
NotifyUI            : False
RebootDeadline      : 19700101010000.000000+000
RebootPending       : False
ReturnValue         : 0
PSComputerName      : MyPSComputer

I would like to Set the following settings:

$Status.IsHardRebootPending = $True
$Status.NotifyUI = $True
$Status.RebootDeadline = [System.Management.ManagementDateTimeConverter]::ToDmtfDateTime($(get-date).AddMinutes(15))

Only this Object those not have a .Put() Methode.
And seems I can use can’t use this either:

Set-WmiInstance -Namespace "ROOT\ccm\ClientSDK" -Class CCM_ClientUtilities -PutType UpdateOnly -EnableAllPrivileges -Arguments @{IsHardRebootPending = $True}

Other Options:

  1. Shutdown.exe Only the Balloon Icons sucks and user will miss it.
  2. Maybe the Windows Update Reboot Req Timer, only can find information about this option.
  3. Msg.exe only this is nice ether.

Any help would really be great!

2

And the Get-member info:

$Status | GM -Force


   TypeName: System.Management.ManagementBaseObject#ROOT\ccm\ClientSDK\__PARAMETERS

Name                MemberType    Definition                                                                                                                                                                                 
----                ----------    ----------                                                                                                                                                                                 
PSComputerName      AliasProperty PSComputerName = __SERVER                                                                                                                                                                  
pstypenames         CodeProperty  System.Collections.ObjectModel.Collection`1[[System.String, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]] pstypenames{get=PSTypeNames;}                    
psadapted           MemberSet     psadapted {__GENUS, __CLASS, __SUPERCLASS, __DYNASTY, __RELPATH, __PROPERTY_COUNT, __DERIVATION, __SERVER, __NAMESPACE, __PATH, DisableHideTime, InGracePeriod, IsHardRebootPending, Not...
psbase              MemberSet     psbase {Properties, SystemProperties, Qualifiers, ClassPath, Item, Site, Container, Dispose, Clone, get_Properties, get_SystemProperties, get_Qualifiers, get_ClassPath, get_Item, set_I...
psextended          MemberSet     psextended {PSComputerName}                                                                                                                                                                
psobject            MemberSet     psobject {Members, Properties, Methods, ImmediateBaseObject, BaseObject, TypeNames, get_Members, get_Properties, get_Methods, get_ImmediateBaseObject, get_BaseObject, get_TypeNames, To...
DisableHideTime     Property      string DisableHideTime {get;set;}                                                                                                                                                          
InGracePeriod       Property      bool InGracePeriod {get;set;}                                                                                                                                                              
IsHardRebootPending Property      bool IsHardRebootPending {get;set;}                                                                                                                                                        
NotifyUI            Property      bool NotifyUI {get;set;}                                                                                                                                                                   
RebootDeadline      Property      string RebootDeadline {get;set;}                                                                                                                                                           
RebootPending       Property      bool RebootPending {get;set;}                                                                                                                                                              
ReturnValue         Property      uint32 ReturnValue {get;set;}                                                                                                                                                              
__CLASS             Property      string __CLASS {get;set;}                                                                                                                                                                  
__DERIVATION        Property      string[] __DERIVATION {get;set;}                                                                                                                                                           
__DYNASTY           Property      string __DYNASTY {get;set;}                                                                                                                                                                
__GENUS             Property      int __GENUS {get;set;}                                                                                                                                                                     
__NAMESPACE         Property      string __NAMESPACE {get;set;}                                                                                                                                                              
__PATH              Property      string __PATH {get;set;}                                                                                                                                                                   
__PROPERTY_COUNT    Property      int __PROPERTY_COUNT {get;set;}                                                                                                                                                            
__RELPATH           Property      string __RELPATH {get;set;}                                                                                                                                                                
__SERVER            Property      string __SERVER {get;set;}                                                                                                                                                                 
__SUPERCLASS        Property      string __SUPERCLASS {get;set;}