SCOM 2012 Maintenance Mode Powershell script ( put a SCOM 2012 group in Maintenance Mode for x hours)

gistfile1.ps1

#
# Puts everything in a specific SCOM GROUP in Maintenance Mode for x hours 
#
# I'm not sure where I got this....script.  Sorry.
#
# Uncomment the 'param' line below if you want to pass values by parameter to this script
#param ($groupName, $MMDurationInHours, $rmsServerName)


$MMDurationInHours = "3" 
$rmsServerName = "scom.domain.com" 
$groupName = "Group Name you want to put in Maint Mode"
$comment = "Scheduled via windows server task on scom.domain.com" # this comment shows up in the SCOM Console.


#Load the Operations Manager snapin and connect to the Root Management Server 
add-pssnapin "Microsoft.EnterpriseManagement.OperationsManager.Client"; 
Set-Location "OperationsManagerMonitoring::"; 

$mgConn = New-ManagementGroupConnection -connectionString:$rmsServerName; 
if($mgConn -eq $null) 
{ 
    [String]::Format("Failed to connect to RMS on '{0}'",$rmsServerName); 
    return; 
} 



Set-Location $rmsServerName;

$startTime = [DateTime]::Now 
$endTime = $startTime.AddHours($MMDurationInHours) 
$MonitoringClassCG = get-monitoringclass | where {$_.DisplayName -eq $groupName} 
$MonitoringGUID = get-monitoringobject $MonitoringClassCG.Id


New-MaintenanceWindow -startTime:$startTime -endTime:$endTime  -comment:$comment -monitoringObject:$MonitoringGUID