Found a nice article about how to script a URL (or web application) into maintenance mode. This was a little bit of a challenge to find so I’m reposting it to hopefully get some more attention. I’ve also posted the modified version of the script that allows for multiple watcher hosts.

Add-PSSnapin "Microsoft.EnterpriseManagement.OperationsManager.Client" -ErrorVariable errSnapin;

Set-Location "OperationsManagerMonitoring::" -ErrorVariable errSnapin;
new-managementGroupConnection -ConnectionString:$rootMS -ErrorVariable errSnapin;
set-location $rootMS -ErrorVariable errSnapin;

$URLWatcher = (Get-MonitoringClass -name Microsoft.SystemCenter.WebApplication.Perspective) | Get-MonitoringObject | where {$_.DisplayName -eq $urlName}

$startTime = [System.DateTime]::Now
$endTime = $startTime.AddMinutes($minutes)

"Putting URL into maintenance mode"
foreach ($name in $URLWatcher) {
New-MaintenanceWindow -startTime:$startTime -endTime:$endTime -monitoringObject:$name -comment:$comment -Reason:$reason }


C:\WINDOWS\system32\WindowsPowerShell\v1.0\powershell.exe URLMaintenanceModeV4.ps1 -rootMS: `SCOMRMS1′ -urlName: ‘MSN Website Checker’ -minutes:45 -comment: ‘My Comment’ -reason: ‘PlannedOther’