XenDesktop - Restart disconnected desktops after 9 hours

#---------------------------------------------------------------------
# Date         : 13-08-2013
# Script name  : Force_restart.ps1
# Description  : Restart disconnected desktops after 9 hours. Only desktops of a desktop group will be restarted.
#                PowerOff disconnected desktops after 10 hours. Only desktops of a desktop group will be restarted.
#
#
# Extra module : citrix*
#        VMware.VimAutomation.Core
#        VMware.VimAutomation.Vds
#
# Copyright    : ©2014 Login Consultants, all rights reserved.
# History      : RJA 20140812 Initial version
#                RJA 20140813 PowerOff added
#---------------------------------------------------------------------

# Import the required Snap-ins

Add-PSSnapIn citrix*
Add-PSSnapIn VMware.VimAutomation.Core
Add-PSSnapIn VMware.VimAutomation.Vds


# Query all  VDI desktops that are in maintenance mode longer then 9 hours.

$forcerebootmachines = Get-BrokerSession -SessionState Disconnected -Filter {SessionStateChangeTime -lt "-9:00"} -HypervisorConnectionName REPLACE WITH GROUP -DesktopGroupName "REPLACE WITH GROUP"| Select-Object HostedMachineName

 foreach ($item in $forcerebootmachines)
 {
    Restart-Computer -Force -computername $item.HostedMachineName
 }



# Shutdown VDI desktops that do not respond to restart-computer

$ConfirmPreference="none"
Set-PowerCliConfiguration -invalidcertificateaction Ignore
Connect-VIServer REPLACE WITH VSPHERE SERVER -notdefault

$forcerebootmachines10 = Get-BrokerSession -SessionState Disconnected -Filter {SessionStateChangeTime -lt "-10:00"} -HypervisorConnectionName REPLACE WITH GROUP -DesktopGroupName "REPLACE WITH GROUP"| Select-Object HostedMachineName

 foreach ($item in $forcerebootmachines10)
 {
    Get-VM -Name $item.HostedMachineName | Stop-VM -Kill
 }