Hello SharePoint Peoples,

So I am trying to figure out how to use a lot of the PnP Commands. Getting hung up on Set-PnPField. I have a column already created, and I can Get-PnPField and read it's properties. The property I am interested in editing is DependantLookupInternalNames which look to be the related columns that will be added to a given list if the Lookup column is added to a list.

I know that you can:

$siteField = Get-PnPField -Identity ThisField
if ($siteField) {
    [xml]$schemaXml = $siteField.SchemaXml
    $schemaXml.Field.ShowField = "NewShowField"
    Set-PnPField -Identity ThisField-Values @{SchemaXml=$schemaXml.OuterXml}

BUT the DependantLookupInternalNames does not show up in the Xml, and if I try:

$dlin = New-Object System.Collections.Generic.List[String]
$values = @{LookupField = "NewShowField"; DepentantLookupInternalNames = $dlin}

I get the

WARNING: No property 'DepentantLookupInternalNames' found on this field. Value will be ignored. WARNING: No property 'LookupField' found on this field. Value will be ignored.

The property names should be correct as that is what Visual Studio Code tells me the property names are when I break point my code there. Is there a reference library for SharePoint Object properties?

Thanks in advance!

  • where did you find about 'DependantLookupInternalNames ' there is no reference to this anywhere...let me know if i am missing something? Jul 24, 2019 at 7:17
  • @SiddharthVaghasia When I break point my code after I use Get-PnPField, I can see it as a property Generic.List in the variable description. I can open up the property and see any Columns I added by hand through SPO.
    – Daniel W
    Jul 24, 2019 at 11:25

1 Answer 1


You can check the FieldLookup properties, the property named "DependentLookupInternalNames".

And you can check the code of the Set-PnPField command.


  • Thanks for the reference material there. So after reviewing it, looks as though this field is NOT editable via PowerShell PnP commands if I am looking at it correctly?
    – Daniel W
    Jul 24, 2019 at 11:32
  • Did you try to use CSOM with PowerShell?
    – LZ_MSFT
    Jul 25, 2019 at 1:26

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