Clean-up MIM History in PowerShell


By default, you can see status of previous Management Agents executions in the History tab in Synchronization Service Manager. But, if you execute some Managent Agents very often it will necessarily increase the amount of logs that will be kept by MIM.


To clear and clean-up MIM history automatically in PowerShell, you can use the following function:

function CleanUpMimHistory ()
 $computerName = "."
 $MIMHistory = Get-Wmiobject -Class 'MIIS_RunHistory' -namespace “root\MicrosoftIdentityIntegrationServer”
 $MIMServer = Get-Wmiobject -Class "MIIS_Server" -Namespace "root\MicrosoftIdentityIntegrationServer" -ComputerName $computerName -ErrorAction SilentlyContinue
 # I configured the number of days in a separated XML file but for the example we will set up in the function
 $daysBeforeHistoryPurge = 15 #$XmlDocument.MIM.'global-settings'.daysBeforeHistoryPurge 
 $endingBefore = [System.DateTime]::UtcNow.AddDays(-$daysBeforeHistoryPurge).ToString("yyyy-MM-dd HH:mm:ss.fff")

 # Clear MA runs History
 Write-Host ("[DEBUG] - Clearing MIM run history older than " + $daysBeforeHistoryPurge + " days")
 $clearRunHistory = $MIMServer.ClearRuns($endingBefore) # Purging
 Write-Host ("[DEBUG] - Status of the clearing operation : " + $clearRunHistory.ReturnValue)
 # Problem : displaying the Exception and Breaking the execution if needed
 Write-Host $($_.Exception.Message)
 Write-Host ("[ERROR] - Problem during the clear of the MIM runs history")

In the below example, I normally set up the number of days for which I will keep the logs in a dedicated XML files that containing all my MIM configuration depending on my Management Agents. But this is only for my configuration, so for the example I have set up the number of days directly in the function (up to you to change and adapt according to your needs).

After a short moment, you will notice the following in the PowerShell output:


The MIM history has been cleaned ! 🙂


To go further, it’s now up to you to automatically call this script on regularly basis (with Task Scheduler for example).

To clear thanks to the GUI, follow this link.

Available to download :