odysseus/docs/email-outlook.md

Outlook / Office 365 email accounts

Odysseus email accounts currently use IMAP and SMTP with username/password authentication. That works for providers that still allow app passwords or mailbox passwords for IMAP/SMTP.

Microsoft disables basic authentication for Outlook and Microsoft 365 in most modern accounts and tenants. If you try to add an Outlook account with a normal password, Microsoft may return errors such as:

• IMAP: AUTHENTICATE failed
• SMTP: 535 5.7.139 Authentication unsuccessful, basic authentication is disabled

This is expected. Odysseus does not support Microsoft OAuth or Graph Mail yet, so Outlook / Office 365 accounts cannot currently be added through the password form. Use another email provider with app-password support, or track the future Microsoft Graph OAuth integration.