Thunderbird 145 has been released with full native support for Microsoft Exchange email via the Exchange Web Services (EWS) protocol.

This means that Thunderbird users in Microsoft Exchange environments (e.g., Microsoft 365, Office 365) no longer need third-party add-ons and benefit from seamless message synchronization and folder management locally and on the server.

Migrating from Outlook to Thunderbird is also easier, as Mozilla’s email client automatically detects the settings and uses Microsoft’s OAuth2 authorization protocol.