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o365psauth

Powershell script to initiate Office 365 (Microsoft 365) authentication

Description

Script goal is to let user proceed with O365 authentication, including MFA, and retrieve the OIDC code that can be later used to obtain an OIDC token.

The powershell script is based on WebView2 embedded browser implementation. Usage:

  • Authenticate with default url, clientId and redirect_uri: .\o365psauth.ps1

  • Authenticate using native OS authentication (workplace join): .\o365psauth.ps1 -SSO

  • Use the provided url to authenticate on a specific application: .\o365psauth.ps1 -url https://login.microsoftonline.com/common/oauth2/authorize?client_id=XXXXXXXXXX&response_type=code&redirect_uri=XXXXXXXXXX&response_mode=query&resource=https%3A%2F%2Foutlook.office365.com

  • In addition, you can retrieve the actual OIDC token: .\o365psauth.ps1 -Token .\o365psauth.ps1 -SSO -Token

Prerequisites

Just retrieve the script and WebView2 runtime from https://github.com/mguessan/o365psauth or use the script with a locally installed runtime, see https://developer.microsoft.com/en-us/microsoft-edge/webview2

Build

Nothing to build, this is just a script

Reference

  • Inspired by:

https://gist.github.com/COFFEETALES

  • Microsoft documentation:

https://learn.microsoft.com/en-us/dotnet/api/microsoft.web.webview2.core