From the PowerShell PnP extensions installed on any machine, copy the files Microsoft.SharePoint.Client.dll and Microsoft.SharePoint.Client.Runtime.dll to the same folder, as this script. Then, you can execute a Rest call like .\RestAgainstSharePointOnline.ps1 -Url https://{yourtenant}.sharepoint.com/_api/web -UserName {youruser} -Password {your…

RestAgainstSharePointOnline.ps1

param (
    [string]$Url,
    [string]$UserName,
    [string]$Password,
    [Microsoft.PowerShell.Commands.WebRequestMethod]$Method = [Microsoft.PowerShell.Commands.WebRequestMethod]::Get
)

$currentPath = (Get-Item -Path ".\").FullName

Add-Type -Path "$currentPath\Microsoft.SharePoint.Client.dll"
Add-Type -Path "$currentPath\Microsoft.SharePoint.Client.Runtime.dll"

<# When PowerShell PnP Extensions are installed, we can use this to load the assemblies
[Reflection.Assembly]::LoadWithPartialName("Microsoft.SharePoint.Client")
[Reflection.Assembly]::LoadWithPartialName("Microsoft.SharePoint.Client.Runtime")
#>

if([string]::IsNullOrEmpty($Password)) {

   $SecurePassword = Read-Host -Prompt "Enter the password" -AsSecureString 

}

else {

   $SecurePassword = $Password | ConvertTo-SecureString -AsPlainText -Force

}

$credentials = New-Object Microsoft.SharePoint.Client.SharePointOnlineCredentials($UserName, $SecurePassword)

$request = [System.Net.WebRequest]::Create($Url)

$request.Credentials = $credentials

$request.Headers.Add("X-FORMS_BASED_AUTH_ACCEPTED", "f")

$request.Accept = "application/json;odata=verbose"

$request.Method=$Method

$response = $request.GetResponse()

$requestStream = $response.GetResponseStream()

$readStream = New-Object System.IO.StreamReader $requestStream

$data=$readStream.ReadToEnd()

$results = $data | ConvertFrom-Json

$results.d

This sample will not work, when WebLogin is necessary, because of the current ADFS configuration of the tenant.