Unexplained Numeric Output from Powershell Script - powershell

Question

We are working on updating scriptPath attributes in AD. We are updating employees in small groups (approximately 100-200 at a time). For this purpose I have created the following script.
$newScript = "foo.vbs"
# Load Employee List
$employeeList = Get-Content "NAM_logon_EmployeeList.txt"
$objDomain = New-Object System.DirectoryServices.DirectoryEntry( "LDAP://OU=Users,DC=foobar,DC=com" )
$objSearcher = New-Object System.DirectoryServices.DirectorySearcher
$objSearcher.SearchRoot = $objDomain
$objSearcher.PageSize = 100
$objSearcher.SearchScope = "Subtree"
$colProplist = "scriptPath", "distinguishedName", "cn"
# Loop through Employee List and update the script value
ForEach ( $employee In $employeeList ) {
$objSearcher.Filter = "(&(objectCategory=person)(objectClass=user)(mail=$employee))"
Foreach ( $colProp in $colPropList ) {
$objSearcher.PropertiesToLoad.Add( $colProp )
}
$colResults = $objSearcher.FindAll()
ForEach ( $user In $colResults ) {
$ntuser = $user.Properties.Item("distinguishedName")
$myUser = $user.Properties.Item("cn")
Script to Pushout the change
$objUser = [ADSI]"LDAP://$($ntuser)"
$objUser.put( "scriptPath", $newScript )
$objUser.SetInfo()
echo "Script Added for $($myUser)"
}
}
The script works fine, but line 18:
$objSearcher.PropertiesToLoad.Add( $colProp )
Outputs numbers to the PowerShell window. One number for each Object and Attribute it adds.
0
1
2
Script Added for Smith, John
4
5
6
Script Added for Doe, Jane
etc.
I don't know why it's doing this. Anyone have any ideas?

Answer 1

It is just output that the command is outputting as it updates the object. A lot of .net objects will do this. If you don't want to see the output do the following:
$null = $objSearcher.PropertiesToLoad.Add( $colProp )

Answer 2

From the documentation found on MSDN:
Return Value
The zero-based index at which the new element is inserted.
So, the numbers you are seeing are the index at which the elements are being added.
For ignoring output like that, I like to do the following:
$objSearcher.PropertiesToLoad.Add( $colProp ) | Out-Null