Change Credential Retrieval in SSRS with powershell - powershell

Question

I want to change SSRS data source credential retrieval from using the following credentials to without any credentials with powershell and script fails.
I want to change value 'Store' to 'None' according to this article:
https://learn.microsoft.com/en-us/dotnet/api/reportservice2010.credentialretrievalenum?view=sqlserver-2016#ReportService2010_CredentialRetrievalEnum_None
This is my code:
$uri ='http://ServerName/ReportServer/ReportService2010.asmx?wsdl'
$reporting = New-WebServiceProxy -uri $uri -UseDefaultCredential -namespace "ReportingWebService"
$DataSources = $reporting.ListChildren('/', $true) | Where-Object {$_.Name -eq "DataSourceName"}
foreach($Object in $DataSources) {
$dataSource =$reporting.GetDataSourceContents($Object.path)
#$dataSource.CredentialRetrieval="None"
$dataSource.CredentialRetrieval=[ReportingWebService.CredentialRetrievalEnum]::None
$reporting.SetDataSourceContents($Object.path,$dataSource)
}
This is the error:
Exception calling "SetDataSourceContents" with "2" argument(s): "The combination of values for the fields UserName and CredentialRetrieval are not valid. --->
Microsoft.ReportingServices.Diagnostics.Utilities.InvalidElementCombinationException: The combination of values for the fields UserName and CredentialRetrieval are not valid."
At line:13 char:4
+ $reporting.SetDataSourceContents($Object.path,$dataSource)
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : NotSpecified: (:) [], MethodInvocationException
+ FullyQualifiedErrorId : SoapException

Answer 1

The issue was that i actually did not change existent credential retrieval settings 'Store' with required Username parameter.
To resolve it i should create new data source definition with new credential retrieval settings and apply it to my data source:
$uri ='http://servername/ReportServer/ReportService2010.asmx?wsdl'
$reporting = New-WebServiceProxy -uri $uri -UseDefaultCredential
$type=$reporting.GetType().Namespace
$DataSources = $reporting.ListChildren('/', $true) | Where-Object {$_.Name -eq "Data source name"}
foreach($Object in $DataSources) {
$dataSource =$reporting.GetDataSourceContents($Object.path)
$dataSourceDefinitionType = ($type + '.DataSourceDefinition');
$dataSourceDefinition = New-Object ($dataSourceDefinitionType);
$dataSourceDefinition.Extension = $dataSource.Extension; #get data from existent data source definition
$dataSourceDefinition.ConnectString = $dataSource.ConnectString #get data from existent data source definition
$credentialRetrievalDataType = ($type + '.CredentialRetrievalEnum');
$credentialRetrieval = new-object ($credentialRetrievalDataType);
$credentialRetrieval.value__ = 3;
$dataSourceDefinition.CredentialRetrieval = $credentialRetrieval;
$dataSourceDefinition.WindowsCredentials = $dataSource.WindowsCredentials; #get data from existent data source definition
$dataSourceDefinition.Enabled = $dataSource.Enabled; #get data from existent data source definition
$dataSourceDefinition.EnabledSpecified = $dataSource.EnabledSpecified; #get data from existent data source definition
$reporting.SetDataSourceContents($Object.path,$dataSourceDefinition)
}