SharePoint Online: Update List Items using PowerShell

Requirement: SharePoint Online PowerShell to Edit List Item

PowerShell CSOM Script to update List Items in SharePoint Online:
Here is the example for SharePoint Online PowerShell to update list item.

#Load SharePoint CSOM Assemblies
Add-Type -Path "C:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\16\ISAPI\Microsoft.SharePoint.Client.dll"
Add-Type -Path "C:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\16\ISAPI\Microsoft.SharePoint.Client.Runtime.dll"
  
#Variables for Processing
$SiteUrl = "https://crescent.sharepoint.com/"
$ListName="Projects"

$UserName="[email protected]"
$Password ="Password goes here"
 
#Setup Credentials to connect
$Credentials = New-Object Microsoft.SharePoint.Client.SharePointOnlineCredentials($UserName,(ConvertTo-SecureString $Password -AsPlainText -Force))
 
#Set up the context
$Context = New-Object Microsoft.SharePoint.Client.ClientContext($SiteUrl) 
$Context.Credentials = $credentials

try{ 
  
    #Filter and Get the List Items using CAML
    $List = $Context.web.Lists.GetByTitle($ListName)

    #Get List Item by ID
    $ListItem = $List.GetItemById(1)  

    #Update List Item title
    $ListItem["Title"] = "Project Darwin"  
    $ListItem.Update()  

    $Context.ExecuteQuery()
    write-host "Item Updated!"  -foregroundcolor Green  
}
catch{  
    write-host "$($_.Exception.Message)" -foregroundcolor red  
} 

This updates the Item with ID: 1 for the given list.

The above script updates a particular list item. What if you want to update all items in the list?

PowerShell to Update All List Items in SharePoint Online:
Here is the PowerShell to update list item in SharePoint Online

#Load SharePoint CSOM Assemblies
Add-Type -Path "C:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\16\ISAPI\Microsoft.SharePoint.Client.dll"
Add-Type -Path "C:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\16\ISAPI\Microsoft.SharePoint.Client.Runtime.dll"
 
#Variables
$SiteURL="https://crescent.sharepoint.com"
$ListName="Projects"

Try {
    $Cred= Get-Credential
    $Credentials = New-Object Microsoft.SharePoint.Client.SharePointOnlineCredentials($Cred.Username, $Cred.Password)

    #Setup the context
    $Ctx = New-Object Microsoft.SharePoint.Client.ClientContext($SiteURL)
    $Ctx.Credentials = $Credentials
    $Web = $Ctx.web

    #Get the List    
    $List = $Ctx.Web.Lists.GetByTitle($ListName)
    $Ctx.Load($List)
    $Ctx.ExecuteQuery()

    #Get All List items
    $ListItemsCAML = New-Object Microsoft.SharePoint.Client.CamlQuery
    $ListItemsCAML.ViewXml = "<View Scope='RecursiveAll'></View>"
    $ListItems = $List.GetItems($ListItemsCAML)
    $Ctx.Load($ListItems)
    $Ctx.ExecuteQuery()

    Write-host "Total Items Found:"$List.ItemCount
    #Iterate through each item and update
    Foreach ($ListItem in $ListItems)
    {
        #Set New value for List column
        $ListItem["Reference"] = $ListItem["ID"]
        $ListItem.Update()
        $Ctx.ExecuteQuery() 
    }
    
    Write-host "All Items in the List: $ListName Updated Successfully!" -ForegroundColor Green  
}
Catch {
    write-host -f Red "Error Updating List Items!" $_.Exception.Message
}

SharePoint Online: PnP PowerShell to Update List Item

Here is how to update list item using PnP PowerShell in SharePoint Online

#Config Variables
$SiteURL = "https://crescenttech.sharepoint.com"
$ListName ="Projects"
$ListItemID ="10"

#Connect to PNP Online
Connect-PnPOnline -Url $SiteURL -Credentials (Get-Credential)

#Get List Item to Update
$ListItem = Get-PnPListItem -List $ListName -Id $ListItemID -ErrorAction Stop

#Update List Item - Internal Names of the columns : Value
Set-PnPListItem -List $ListName -Identity $ListItem -Values @{"ProjectName" = "SharePoint 2016 Migration"; "ProjectID"="Abj-IT-3021"}

Similarly, we can use the query parameter to filter and get a list item:

#Config Variables
$SiteURL = "https://crescenttech.sharepoint.com"
$ListName ="Projects"
$ListItemTitle ="SharePoint 2016 Migration"

#Connect to PNP Online
Connect-PnPOnline -Url $SiteURL -Credentials (Get-Credential)

#Get List Item to Update by Query
$ListItem = Get-PnPListItem -List $ListName -Query "<View><Query><Where><Eq><FieldRef Name='Title'/><Value Type='Text'>$ListItemTitle</Value></Eq></Where></Query></View>" -PageSize 1 -ErrorAction Stop

#Update List Item - Internal Names of the columns : Value
Set-PnPListItem -List $ListName -Identity $ListItem -Values @{"Title" = "SharePoint 2016 Migration V2"; "ProjectID"="Abj-IT-3025"}

If you want to bulk update list items from a CSV file, use: SharePoint Online: Update List Items from a CSV File using PowerShell

How to Update Fields like Lookup, People Picker, Managed metadata, Hyperlink, etc?
The above scripts work just fine with simple field types like Single lines of text, choice, Yes/No, etc. However, for other field types such as Managed metadata, Hyperlink, Lookup, People Picker, etc. we've to handle them differently. Here are my posts to help:

• SharePoint Online: PowerShell to Update Lookup Field Value
• SharePoint Online: Update Hyperlink Field Value using PowerShell
• SharePoint Online: PowerShell to Update Lookup Field Value
• SharePoint Online: Update Managed Metadata Field Value using PowerShell
• SharePoint Online: Update Person or Group Field Values using PowerShell
• SharePoint Online: Update Choice Field Value using PowerShell
• SharePoint Online: Update "Yes/No (Checkbox)" Field Value using PowerShell
• SharePoint Online: PowerShell to Update Date Field Value