Testing email workflows—like OTP verification, password resets, or automated notifications—is a core requirement for robust end-to-end (E2E) automation. However, automating Office 365 (O365) Shared Mailboxes via UI logins or legacy IMAP basic authentication is a nightmare. UI logins trigger MFA, IMAP basic auth is deprecated across Microsoft 365, and browser automation for Outlook web is notoriously flaky. The enterprise-grade solution? Use Microsoft Graph API with Client Credentials (Ap...