SoPoCoder

# Copies choice values from a SharePoint document library source column and adds them (when present in the term store) as tags to a target column
# Will not increment version history or modify modified/modified by columns

# Define constants
$SiteUrl = "https://your-tenant.sharepoint.com/sites/site-name"
$ClientId = "xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx" # This should be the guid of your tenant's registered PnP Powershell module
$ListName = "Library Name"
$SourceColumn = "SourceColInternalName" # This field should be of type 'Choice' or 'MultiChoice'
$TargetColumn = "TargetColInternalName" # This field should be of type 'TaxonomyFieldType' or 'TaxonomyFieldTypeMulti'
$TermGroupId = "xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx" # The guid of the term group containing the tags that should be referenced

SoPoCoder

#Function to copy values from one column to another in a list or document library (target column should be same type as source column)
#From https://www.sharepointdiary.com/2019/05/sharepoint-online-copy-values-from-one-column-to-another-using-powershell.html
#The account running the script needs to have edit permissions to the site or library

#Define constants 
$SiteUrl = "https://your-tenant.sharepoint.com/sites/site-name"
$ClientId = "xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx" # This should be the guid of your tenant's registered PnP Powershell module
$ListName = "Library Name"
$SourceColumn = "SourceColInternalName" 

SoPoCoder

#Generic script to loop through rows of a SharePoint list/library to make modifications to column values

#Define constants 
$SiteUrl = "https://your-tenant.sharepoint.com/sites/site-name"
$ClientId = "xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx" # This should be the guid of your tenant's registered PnP Powershell module
$ListName = "Library Name"

#Connect to SharePoint Online site
Connect-PnPOnline $SiteUrl -Interactive -ClientId $ClientId