param ($rootMS, $groupName, $timeLength, $timeType, $cmdReason, $cmdComment)

#Setup variables
     $ErrorActionPreference = "SilentlyContinue"	
     $dictReason = @{1='plannedhardwaremaintenance';2='unplannedhardwaremaintenance';3='plannedhardwareinstallation';4='unplannedhardwareinstallation';5='plannedoperatingsystemreconfiguration';6='Unplannedoperatingsystemreconfiguration';7='plannedapplicationmaintenance';8='unplannedapplicationmaintenance';9='applicationinstallation';10='applicationunresponsive';11='applicationunstable';12='securityissue';13='lossofnetworkconnectivity';14='unplannedother'}
     $dictTimeType = @{1='minutes';2='hours';3='days'};

#Checking Root MS parameter
     if ($rootMS -eq $null) {
	Write-Host "serverMS parameter is NULL or not accepted by Powershell";
	Write-Host "EX: rootManagementServer.fqdn.local";
	Write-Host "Syntax:";
	Write-Host "-rootMS: FQDN of the root management server for the target management group. `n Ex: RootManagementServer.fqdn.local";
        Write-Host "-groupName: The target group.  Use the display name of the group. `n Ex: 'NOC Computers Test'"; 
	Write-Host "-timeLength: The time interval amount for the maintenance. 'n Ex: 12";
	Write-Host "-timeType: Can be one of the following: minutes, hours, days";
	Write-Host "-cmdReason: Can be one of the following:`n   plannedhardwaremaintenance `n   unplannedhardwaremaintenancev`n   plannedhardwareinstallation `n   unplannedhardwareinstallation `n   plannedoperatingsystemreconfiguration `n   unplannedoperatingsystemreconfiguration `n   plannedapplicationmaintenance `n   unplannedapplicationmaintenance `n   applicationinstallation `n   applicationunresponsive `n   applicationunstable `n   securityissue `n   lossofnetworkconnectivity 'n   unplannedother";
	Write-Host "-cmdComment: Any explanation you want. If left blank, the script will send the 'N/A' comment.`n EX: 'This server is BSOD like crazy!'";
	exit;
     }

#Initializing the Ops Mgr 2007 Powershell provider
     add-pssnapin "Microsoft.EnterpriseManagement.OperationsManager.Client" -ErrorVariable errSnapin ;
     set-location "OperationsManagerMonitoring::" -ErrorVariable errSnapin ;
     new-managementGroupConnection -ConnectionString:$rootMS -ErrorVariable errSnapin ;
     set-location $rootMS -ErrorVariable errSnapin ;

#Checks to see if it failed or succedded in loading the provider
     if ($errSnapin.count -eq 0){
	Write-host "`nOpsMgr 2007 PSSnapin initialized!`n";
     }
     else{
	Write-host "`nOpsMgr 2007 PSSnapin failed initialize!`nPlease verify you are running this script on a Ops Mgr 2007 Management Server";
	Write-host;
     }
	
#Check Command Line Parameters
#Checking for the groupName parameter
     if ($groupName -eq $null) {
	Write-Host "groupName parameter is NULL or not accepted by Powershell";	
	Write-Host "EX: AD Domain Controller Group (Windows 2003 Server)";
	exit;	
     }

#Checking for the timeLength parameter
     if ($timeLength -eq $null) {
	If ($timeLength.GetType().Name -ne "Int32") {
        	if ($timeLength.GetType().Name -ne "Double") {
	        	Write-host "timeLength is either NULL or not a number.";
		        Write-Host "EX: 12 or 12.5";
		}
	}
     }
   
   
#Checking for the timeType parameter
     if (!($dicttimeType.ContainsValue($timeType.ToLower()))) {
		Write-Host "timeType has incorrect parameter.";
	       	Write-Host "Options: Minutes, Hours, Days";
			exit;
     }


#Checking for the cmdReason parameter
     if ($dictReason.ContainsValue($cmdReason.ToLower()) -eq $true){
	$outReason = $cmdReason;
     }
     else {
     $outReason = "UnPlannedOther";	          
     }

#Checking for the cmdComment parameter
     if (($cmdComment -eq $null) -or ($cmdComment -eq "")){
         $outComment = "N/A";
     }
     else{
         $outComment = $cmdComment;
     }


#Main Program
#Finding Group based on DisplayName
     $groupAgents = get-monitoringobject | where {$_.DisplayName -eq $groupName};   

#Get Current Date/Time
     $timeFrame = get-date;

#Initialize maintenance based on parameters
     if ($timeType -eq "minutes") {
         $groupAgents | New-MaintenanceWindow -startTime: $timeFrame -endTime: ($timeFrame.AddMinutes($timeLength)) -reason: $outReason -comment: $outComment -ErrorVariable err ;
     }
     elseif ($timeType -eq "days") {
         $groupAgents | New-Maintenancewindow -startTime: $timeFrame -endTime: ($timeFrame.AddDays($timeLength)) -reason: $outReason -comment: $outComment -ErrorVariable err ;
     }
     elseif ($timeType -eq "hours") {
         $groupAgents | New-Maintenancewindow -startTime: $timeFrame -endTime: ($timeFrame.AddHours($timeLength)) -reason: $outReason -comment: $outComment -ErrorVariable err ;
     }

#Checks status and post to console on Success or fail
     if ($err.Count -eq 0) {
	Write-Host "The group" $groupAgents.DisplayName "is now in maintenance for $timelength $timeType.";
        Write-Host "Script completed successfully!";
     }
     else {
	Write-Host "The group" $groupName "is not in maintenance mode.";
	Write-Host "Please review command line parameters.";
     }