Persistent Office 365 Cookie Login

My team at Brand Vibe spends a lot of time re-entering passwords each time we open Outlook on the web. What I need is a small, secure utility that stores a long-lived authentication cookie locally so our Windows-based staff can jump straight into Office 365 mail on any major browser—Chrome, Edge, or Firefox—without typing credentials over and over again. Here is what I have in mind: • A lightweight script, extension, or helper file that captures the valid Micro soft 365 session cookie after the first successful login and then re-injects it on subsequent visits. • Full compatibility with Windows 10/11 and smooth operation in the latest versions of Chrome, Edge, and Firefox. • Clear instructions so my non-technical staff can install, revoke, or refresh the cookie whenever we change a password or need to wipe machines. • Security best practices baked in: the cookie must be stored only on the local machine, encrypted if feasible, and never transmitted to third parties. • A brief walkthrough showing how your solution handles different sign-in flows, given that I’m not sure whether our tenant is currently using any Microsoft SSO enhancements. Acceptance criteria 1. I can log in once, close the browser, reopen it, and land in my Outlook inbox with no additional credential prompt. 2. Clearing the stored data (via a provided script or documented steps) forces a normal password prompt again, confirming the cookie removal works. 3. No Micro soft security warnings or conditional-access blocks arise during testing. Deliverables • The executable/script or browser add-on with source files. • A concise setup guide (PDF or Markdown). • Optional: a short video demo (<5 min) showing first-time setup and repeat login. If you’ve previously automated Micro soft 365 logins or handled secure cookie storage on Windows, your experience will be invaluable. Let me know your proposed approach and any questions you have so we can move forward quickly.