My thanks to Matt Taylor and Kevin Holman, Ralph Kyttle, and John Kavanagh for their guidance!

Updated 24 Jun 2022

Read on if these apply
Trying to start, update, or end SCOM MM

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SCORCH in play but need to convert runbooks to straight PowerShell

Ran into issues using Set-SCOMMaintenanceMode, as the cmdlet doesn’t put ALL the recursive classes under Windows Computer

Background

Set-SCOMMaintenanceMode cmdlet is actually “by design.”  ☹

Start-SCOMMaintenanceMode assumes you want recursive action when you start maintenance mode….

Pick a Windows Computer and it places the Windows Computer object (AND all contained objects) into MM.

Computer in MM

All contained objects in MM

However, the problem is that Set-SCOMMaintenancemode does not have an understanding of recursiveness.

Command changes the MM entry for the Windows Computer, but NOT all the contained objects.  So they retain the original setting.

Health explorer looks like this, resulting in unwanted alerts

Details

NOTE these $Time and DateTime Method are dependent on the delay between running the commands
If you start MM, and wait 5 minutes, then update, the total MM duration will be ~20 minutes

Maintenance Mode options and examples

# Setup variables for MM

# Example 1 Windows Computer

$server = “Servername.FQDN”

$instance = (get-scomclass -DisplayName “Windows Computer” |Get-SCOMClassInstance | where { $_.DisplayName -eq $server } )

# Set time for 6 minutes

$Time = (Get-Date).addMinutes(6)

Start-SCOMMaintenanceMode -Instance $Instance -EndTime $Time -Comment “Starting Maintenance Mode.” -Reason “PlannedOther”

# Example 2

# Business needs require Windows Operating System monitoring to occur while Application is in maintenance

# My Example is Defender, could be SQL, MSMQ, Lync, Skype, or your custom class created for your application

$Class = (get-scomclass)
$Class | ? { $_.Name -like “*Defender*” } | fl DisplayName,Name
$Class | ? { $_.Name -like “*Defender*” } | fl DisplayName,Name

DisplayName : Protected Endpoint
Name        : Microsoft.WindowsDefender.ProtectedServer

DisplayName : Protected Candidate
Name        : Microsoft.WindowsDefender.ProtectedServerCandidate

DisplayName : Unprotected Endpoint
Name        : Microsoft.WindowsDefender.UnprotectedServer

DisplayName : Microsoft Windows Defender Class
Name        : Microsoft.Windows.Defender.Class

# Choose the class needed

$server = “Servername.FQDN”

$instance = ( $Class | ? { $_.Name -like “Microsoft.Windows.Defender*” } |Get-SCOMClassInstance | ? { $_.DisplayName -eq $server } )

# Verify Instance variable

$instance

PS C:\Users\scomadmin> $instance

HealthState     InMaintenanceMode  DisplayName
———–     —————–  ———–
Success               False        WFM.testlab.net

# Don’t forget to add time variable

$Time = (Get-Date).addMinutes(6)

# Start maintenance mode

Start-SCOMMaintenanceMode -Instance $Instance -EndTime $Time -Comment “Starting Maintenance Mode.” -Reason “PlannedOther”

Start, Update, End and Verify Maintenance mode syntax

# Start MM via PoSH cmdlet

Start-SCOMMaintenanceMode -Instance $Instance -EndTime $Time -Comment “Starting Maintenance Mode.” -Reason “PlannedOther”

# Start MM using method vs. PowerShell cmdlet

Note Recursive in $WCobj.ScheduleMaintenanceMode

$windowsComment=”PlannedOther”
$windowReason=”PlannedOther”
$windowsComment=”Testing Maintenance Mode”
$windowDuration=15

$server= “wfm.testlab.net”
$instance = (get-scomclass -DisplayName “Windows Computer” |Get-SCOMClassInstance | ? { $_.DisplayName -eq $server } )
$instance.ScheduleMaintenanceMode([datetime]::Now.touniversaltime(),([datetime]::Now).addminutes($windowDuration).touniversaltime(), “$windowReason”, “$windowsComment” , “Recursive”)

# Drop Recursive if you don’t want it (but can’t imagine why you would!)

# Update MM

# Make sure you’ve put object in MM

$server= “wfm.testlab.net”
$instance = (get-scomclass -DisplayName “Windows Computer” |Get-SCOMClassInstance | ? { $_.DisplayName -eq $server } )

# 15 minutes in the future
$instance.UpdateMaintenanceMode([System.datetime]::Now.touniversaltime().addminutes(15),[Microsoft.EnterpriseManagement.Monitoring.MaintenanceModeReason]::PlannedOther,[System.string]::”Adding 15 minutes to the end time.”,[Microsoft.EnterpriseManagement.Common.TraversalDepth]::Recursive);

# Stop MM

# Make sure you’ve put object in MM

# Immediate
$instance.StopMaintenanceMode([System.DateTime]::Now.ToUniversalTime());

My thanks to Jan Nevaril

$server.StopMaintenanceMode([System.DateTime]::Now.ToUniversalTime(),“Recursive”)

Verification steps

# Verify MM

get-scommaintenancemode -ComputerName $instance.Name|fl MonitoringObjectId,StartTime,ScheduledEndTime

NOTE This will error if you’ve stopped maintenance

Example

PS C:\Users\scomadmin> get-scommaintenancemode -ComputerName $instance.Name
get-scommaintenancemode : The Data Access service is either not running or not yet initialized. Check the event log
for more information.
At line:1 char:1
+ get-scommaintenancemode -ComputerName $instance.Name
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo          : InvalidOperation: (Microsoft.Syste…anceModeCommand:GetSCMaintenanceModeCommand) [Get-S
COMMaintenanceMode], ServiceNotRunningException
+ FullyQualifiedErrorId : ExecutionError,Microsoft.SystemCenter.OperationsManagerV10.Commands.GetSCMaintenanceMode
Command

# Validate MM through Operations Manager Event ID’s 1215 and 1216 logged

get-eventlog -LogName “Operations Manager” | ? { $_.EventID -eq 1215 -OR $_.EventID -eq 1216 } |fl EventID,TimeGenerated,Message

# Alternate command to check latest 100 events

get-eventlog -LogName “Operations Manager” -newest 100 | ? { $_.EventID -eq 1215 -OR $_.EventID -eq 1216 } |fl EventID,TimeGenerated,Message

# Error if object NOT in MM

Cannot find an overload for “UpdateMaintenanceMode” and the argument count: “1”.

At line:1 char:1

+ $WCobj.UpdateMaintenanceMode(([System.datetime]::Now).addminutes(15). …

+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

    + CategoryInfo          : NotSpecified: (:) [], MethodException

    + FullyQualifiedErrorId : MethodCountCouldNotFindBest

PS C:\Windows\system32>

Testing System datetime

PS C:\Windows\system32> [System.datetime]::Now.addminutes(15)

Thursday, August 24, 2017 9:18:04 AM

PS C:\Windows\system32> ([System.datetime]::Now.addminutes(15)).touniversaltime()

Thursday, August 24, 2017 2:18:16 PM

References

2012 PowerShell cmdlets https://docs.microsoft.com/en-us/previous-versions/system-center/hh920227(v=sc.20)

2016 PowerShell cmdlets https://docs.microsoft.com/en-us/powershell/module/operationsmanager/?view=systemcenter-ps-2016

2019 PowerShell cmdlets https://docs.microsoft.com/en-us/powershell/module/operationsmanager/?view=systemcenter-ps-2019

SDK

Ralph Kyttle Blog https://blogs.technet.microsoft.com/ralphkyttle/2014/11/10/scom-2012-r2-use-powershell-to-end-an-active-maintenance-mode/

DateTime Methods https://docs.microsoft.com/en-us/dotnet/api/system.datetime

SCOM 2019 Maintenance Mode
https://docs.microsoft.com/en-us/system-center/scom/manage-maintenance-mode-overview?view=sc-om-2019

MSDN MaintenanceModeReason Method https://docs.microsoft.com/en-us/previous-versions/system-center/developer/bb465591(v=msdn.10)

MSDN StopMaintenanceMode Method

UpdateMaintenanceMode Method https://docs.microsoft.com/en-us/previous-versions/system-center/developer/bb424495(v=msdn.10)

MM deluxe custom script https://gist.github.com/stegenfeldt/b3f044aa77894ed80d82f8849a48035b