Hi. Thank you for your question and reaching out. I’d be more than happy to help you with your query.

You can use PowerShell to automate adding a column to multiple document libraries. First, you will need to create the column and set its properties. You can use the PowerShell command New-SPField to do this. After creating the column, you can use the command Add-SPFieldToList to add the column to a single library.

To add the column to multiple libraries, you will need to use a foreach loop. You can use the command Get-SPWeb to get all the document libraries in your SharePoint site. Then, you can use the foreach loop to loop through each library, and use the Add-SPFieldToList command to add the new column to each library.

For example:

Get all the libraries in the site

$libraries = Get-SPWeb -Limit ALL | Select-Object -ExpandProperty Lists

Loop through each library

foreach($library in $libraries)

{

# Add the new column to the current library

Add-SPFieldToList -List $library -Field "NewColumnName"

}

If the reply was helpful, please don’t forget to upvote or accept as answer, thank you.

1.Create a csv file as following picture shows. Enter document library title in the csv file.

2.Please run below PowerShell.

$DisplayName = "testtextcolumn"
$InternalName = "testtextcolumn" 

$Credential = Get-Credential
Connect-PnPOnline -Url "https://tenant.sharepoint.com/sites/emilytestnew" -Credential $Credential

$filePath = “C:\Users\spadmin\Desktop\dl.csv”  

$csv = Import-Csv $filePath  
$a = $csv.Title
  
ForEach($_ in $a) {  

    Add-PnPField -List $_ -DisplayName $DisplayName -InternalName $InternalName -Type Text -AddToDefaultView

} 

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