Change DataSource of SSRS Report with Powershell

I got it now! Here's the working solution:

cls;

 #Set variables:
 $reportserver = "myServer";
 $url = "http://$($reportserver)/reportserver/reportservice2005.asmx?WSDL";
 $newDataSourcePath = "/Data Sources/MyDS";
 $newDataSourceName = "MyDS";
 $reportFolderPath = "/DH";
 #------------------------------------------------------------------------

 $ssrs = New-WebServiceProxy -uri $url -UseDefaultCredential

 $reports = $ssrs.ListChildren($reportFolderPath, $false)

 $reports | ForEach-Object {
 $reportPath = $_.path
 Write-Host "Report: " $reportPath
 $dataSources = $ssrs.GetItemDataSources($reportPath)
 $dataSources | ForEach-Object {
 $proxyNamespace = $_.GetType().Namespace
 $myDataSource = New-Object ("$proxyNamespace.DataSource")
 $myDataSource.Name = $newDataSourceName
 $myDataSource.Item = New-Object ("$proxyNamespace.DataSourceReference")
 $myDataSource.Item.Reference = $newDataSourcePath

 $_.item = $myDataSource.Item

 $ssrs.SetItemDataSources($reportPath, $_)

 Write-Host "Report's DataSource Reference ($($_.Name)): $($_.Item.Reference)";
 }

 Write-Host "------------------------"
 }

Thanks, Worked like a charm.

One Small correction in the second one, need to update the $url

Declaring and Defining the $url variable is missing. Other than that, It works perfect

David Levy wrote a script that changes the credentials of SSRS reports using PowerShell that I think you might want to compare with yours on how he uses SetItemDataSources.

I think your line $myDataSource variable needs to be adjusted in how you are trying to set that up.