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How do you set sharepoint user field to allow multiple users with powershell?

Add-PnPField -List $RecordListName -DisplayName $fieldName -InternalName $fieldName  -Type User -Required -AllowMultipleValues -ErrorAction Continue -AddToDefaultView | Out-Null

Tried using -AllowMultipleValues but get the below error

Error: A parameter cannot be found that matches parameter name 'AllowMultipleValues'.

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In order to add a multi-choice user field, you need to use the Add-PnPFieldFromXML method.

Also, the multi-choice user field is a not a simple property. In fact, it's a totally different field type: Type="UserMulti":

$fieldXml = '<Field Type="UserMulti" DisplayName="Demo Presentors" List="UserInfo" Required="FALSE" ID="{bd66d0d0-c441-4ce3-909a-204ff01cdcb7}" ShowField="EMail" UserSelectionMode="PeopleOnly" StaticName="DemoPresentors" Name="DemoPresentors" Mult="TRUE" />'

Add-PnPFieldFromXml -List $RecordListName -FieldXml $fieldXml
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  • Is there a way to pass a GUID variable to the xml? I am passing the variable fieldID and get Add-PnPFieldFromXml : Expected hex 0x in '{0}'. $FieldID = New-Guid $fieldXml = '<Field Type="UserMulti" DisplayName="Auxiliary_Admin" List="SiteRecord" Required="FALSE" ID="{$fieldID}" ShowField="Email" UserSelectionMode="PeopleOnly" StaticName="Auxiliary_Admin" Name="Auxiliary_Admin" Mult="TRUE" />' $fieldID Add-PnPFieldFromXml -List $RecordListName -FieldXml $fieldXml Commented Jul 27, 2021 at 18:14
  • Sure, the XML is just a string. So you can parameterize it. For example, ... ID=$GUID Commented Jul 27, 2021 at 19:04

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