sitecolumn.ps1

#Credentials to connect to office 365 site collection url 
$url ="https://velegandla.sharepoint.com/sites/training"
$username="[email protected]"
$password="yourpassword"
$Password = $password |ConvertTo-SecureString -AsPlainText -force

# site columns
$Name ="SPJName"

Write-Host "Load CSOM libraries" -foregroundcolor black -backgroundcolor yellow
Set-Location $PSScriptRoot
Add-Type -Path (Resolve-Path "Microsoft.SharePoint.Client.dll")
Add-Type -Path (Resolve-Path "Microsoft.SharePoint.Client.Runtime.dll")
Write-Host "CSOM libraries loaded successfully" -foregroundcolor black -backgroundcolor Green 

Write-Host "authenticate to SharePoint Online site collection $url and get ClientContext object" -foregroundcolor black -backgroundcolor yellow  
$Context = New-Object Microsoft.SharePoint.Client.ClientContext($url) 
$credentials = New-Object Microsoft.SharePoint.Client.SharePointOnlineCredentials($username, $password) 
$Context.Credentials = $credentials 
$web = $context.Web
$fields = $web.Fields;         
$site = $context.Site 
$context.Load($web)
$context.Load($fields)
$context.Load($site)
try
{
  $context.ExecuteQuery()
  Write-Host "authenticateed to SharePoint Online site collection $url and get ClientContext object succeefully" -foregroundcolor black -backgroundcolor Green
}
catch
{
  Write-Host "Not able to authenticateed to SharePoint Online site collection $url $_.Exception.Message" -foregroundcolor black -backgroundcolor Red
  return
}


Write-Host "Check if the site column" $Name "is exist or not" -foregroundcolor black -backgroundcolor yellow  
foreach ($item in $fields)
{
if ($item.InternalName -eq $Name)
{
   Write-Host "Site column" $Name "is already exist" -foregroundcolor black -backgroundcolor Red
   return
}
}

Write-Host "creating site column" $Name -foregroundcolor black -backgroundcolor yellow 

$fieldAsXML = 
              "<Field Type='Text' 
              DisplayName='SPJ Name'
              Name='"+$Name+"'
              ID='{545E5A0D-5553-4E02-97B3-F2D225B649D7}'
              Group='SPJ Site Columns' />";
            
$fieldOption = [Microsoft.SharePoint.Client.AddFieldOptions]::DefaultValue

$field = $fields.AddFieldAsXml($fieldAsXML, $true, $fieldOption)
$context.Load($field)
try
{
  $context.ExecuteQuery()
  Write-Host "Site column" $Name "created successfully" -foregroundcolor black -backgroundcolor Green 
}
catch
{
  Write-Host "Error while creating site column" $Name $_.Exception.Message -foregroundcolor black -backgroundcolor Red 
  return
}