====== Domain wite update GPO using Powershell ======
gpupdate /target:computer
gpupdate /force

<code bash>
#Get all computers
$cn = Get-ADComputer -filt *

#Get admin credentials
$cred = Get-Credential iammred\administrator

#Create sessions
$session = New-PSSession -cn $cn.name -cred $cred
#This will result in an error for each offline client

#Run command
icm -Session $session -ScriptBlock {gpupdate /force}

#Check if executed OK
icm -Session $session -ScriptBlock {Get-EventLog -LogName system -InstanceId1502 -Newest 1}

#remove session
remove-pssession $Session
</code>