Remove from Collection using Maik Kosters Webservice

There are many examples out there on how to remove a computer from a collection after OS Deployment is finished. I have used different scripts in different scenarios but at a customer lately we had a requirement to open as few ports as possible in the firewall. If you run a script from the Task Sequence on the client side that remove the device from a collection you will need to for example open RPC High Ports which could be avoided.

That is why I wrote this little Powershell script that will remove the computer from a collection and clear the PXE flag as well using Maik Koster’s excellent webservice instead and a Powershell script to use it. Maik Koster’s webservice can be downloaded here , don’t forget to secure it using request filtering in IIS.

The Powershell script

The following script is used to call the webservice, in this example we use Maik Koster’s webservice and call it using UUID as the identifier on the command line. The following lines need to be configured in the script below.
[string]$UsrName = “Contoso\wbssvc”

[string]$UsrPW = “Pa@ssw0rd”

[string]$SiteCode = “123”
[string]$URI = “http://sccm02/webservice/sccm.asmx?WSDL”

Copy the script and place it in a folder that can be used as a package source for a package so we can call the script from a package in the Task Seqeunce.

The script:






[string]$UsrName = "Contoso\wbssvc"

[string]$UsrPW = "Pa@ssw0rd"

[string]$SiteCode = "123"

[string]$Macaddress = ""

[string]$URI = "http://sccm02/webservice/sccm.asmx?WSDL"

$secpasswd = ConvertTo-SecureString "$UsrPW" -AsPlainText -Force

$mycreds = New-Object System.Management.Automation.PSCredential ("$UsrName", $secpasswd)

$zip = New-WebServiceProxy -uri $URI -Credential $mycreds

# Invoke Web Service

$method = "ClearLastPXEAdvertisementForComputer"




$method = "RemoveComputerFromCollection"





Write-Output "$_.Exception.Message"

exit 1


exit 0

The Task Sequence step

Before we create a package we need to edit the information in the script above. Then create a package from which we can call the script.

I prefer to use a run command line step to run the powerhsell script and call the webservice. Use the package we created before to run the command from.

The following command line can be used, where the last part is the collection the device should be removed from, you need to change that to reflect your environment: “Powershell.exe -NoProfile -ExecutionPolicy ByPass -File RemoveFromOSDCollection1.ps1 %OSDcomputername% %UUID% 06000062”


That should do it, deploy the task sequence and test it out.


  • The script will return an error if the computer cannot be removed from the Collection, you can solve it with continue on error.
  • If you import a computer with MAC address you need to change the script to use MAC address instead of UUID to remove it

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