Using Thunderbird (IMAP) with Microsoft Office 365 Thunderbird with Microsoft 365 https://helpdesk.eng.uci.edu/content/using-thunderbird-imap-microsoft-office-365 Using Thunderbird (IMAP) with Microsoft Office 365 You can configure your IMAP mail client such as Thunderbird to access your email on Microsoft Office 365. Step-by-step Instructions How to: Setup Microsoft 365 with Thunderbird Settings Server Type: IMAP Server name: outlook.office365.com Port: 993 Connection security: SSL/TLS Authentication method: OAuth2 User name: ucinetid@ad.uci.edu Server Type: SMTP Server name: smtp.office365.com Port: 587 Connection security: STARTTLS Authentication method: OAuth2 User name: ucinetid@ad.uci.edu   In the Thunderbird folder list, right click and select "Subscribe" to choose which IMAP folders are shown. Quelle: Obsidian Knowledge Base/Thunderbird/Thunderbird with Microsoft 365.md · Stand: 2026-04-10 · Automatisiert publiziert durch Hermes.