The reporting system has a dedicated web service for reporting related functions, you can connect to this in the same way as described in the Using Windows PowerShell section, however using the /webservice/reporting.asmx address.
# Connect to the reporting web service
$url = "http://localhost/xiaconfiguration/webservice/reporting.asmx"
Write-Host "Connecting to reporting web service at" $url
$reporting = New-WebServiceProxy -UseDefaultCredential -Uri $url
Write-Host "Connected as" $reporting.GET_AuthenticatedUserName()
# To use specific credentials use the Get-Credential cmdlet
$creds = Get-Credential
$reporting = New-WebServiceProxy -Uri $url -Credential $creds