Automating Unmanaging Nodes

If you are trying to do it from the GUI from the Manage Nodes screen you can checkbox several nodes then click Maintenance Mode then Schedule and put the start/stop times and select Stop polling object.

Another method is using the API. Below are a couple links

GitHub - solarwinds/OrionSDK: SDK for the SolarWinds Orion platform, including tools, documentation, and samples in PowerShell, C#, Go, Perl, and Java.

(+) how to manage and unmanage nodes via powershell - Orion SDK - The Orion Platform - THWACK (solarwinds.com)

We use this method in our server retirement scripts and you can define start/end/forever time/date in the script.

How do you run that script?  Do you have someone manually execute it or does it run through a ticketing system of somesort?

If you Google 'execute PowerShell script from ServiceNow' there are several articles that go into detail on how it is done.

Totally doable, Bob's sent you down the right path

Hello, the SolarWinds Unmanaged Task Editor can help you by configuring a task on Windows servers.

Here is a script I use sometimes, it grabs a list of nodes from a file. I didn't take the time to convert the time to local time so take note in the script. 

You will need to have the Solarwinds SDK installed to use it which is available at GitHub. 

CLS
Add-PSSnapin SwisSnapin
$swis = Connect-Swis -host YOURORIONSERVERGOESHERE -Trusted

Write-Host " "
Write-Host "Important, the script MUST run in UTC time. Local EST and UTC time is displayed below for reference"
Write-Host "Ensure the variables below for $StartInUTC and  $EndInUTC are in UTC"
Write-Host "There is a SWQL query you can run in SWQL studio at the bottom of the script to verify the nodes that you unmanage have the correct times"
Write-Host " "

$dateT = Get-Date -Format "dddd MM/dd/yyyy HH:mm K"
Echo "Current EST Date and Time is $dateT UTC Offset"

$UTCTime = Get-Date -UFormat "%A %B/%d/%Y %T %Z"
$Time = Get-Date
$UTCTIME = $Time.ToUniversalTime()
Echo "Current UTC Date and Time is $UTCTIME"

$StartInUTC = "1/18/2023 13:45:00 PM"
$EndInUTC = "1/18/2023 13:50:00 PM"

Get-SwisData $swis "SELECT Uri FROM Orion.Nodes WHERE IPAddress IN @IPAddress" @{IPAddress=(Get-Content c:\powershellscripts\UnmanageNodes\nodelistWest.txt)} | Set-SwisObject $swis -Properties Orion.AlertSuppression SuppressAlerts @(SuppressFrom=$StartInUTC; SuppressUntil$EndInUTC )

#########################
#Here is the SWQL Query to verify your work
#SELECT TOP 1000 NodeID, IPAddress, Caption, UnManaged, TOLOCAL (UnManageFrom) AS LocalUnManageFrom, TOLOCAL (UnManageUntil) AS LocalReManageTime
#FROM Orion.Nodes
#--Adjust the Where to your needs below
#--Where UnManaged = TRUE
#Where Caption LIKE '%SERVERSYOUARE UNMANAGING%'
#ORDER BY UnManageUntil