Thunderbird 145 now includes native support for Microsoft Exchange email through the Exchange Web Services (EWS) protocol. This update allows users in Microsoft Exchange environments, such as Microsoft 365 or Office 365, to synchronize messages and manage folders without relying on third-party add-ons. Transitioning from Outlook is simpler, as Thunderbird can automatically detect necessary settings and uses Microsoft’s OAuth2 for authorization. Key features of this release include setting up Exchange accounts, accessing folders, and handling emails—sending, receiving, moving, and deleting messages. Users can also manage attachments and conduct searches within the email body or subject. Thunderbird supports both Microsoft 365 domains with standard OAuth2 and on-premise Exchange with basic password authentication. Looking ahead, the Thunderbird team plans to enhance the platform with features like calendar syncing, address book integration, and custom OAuth2 app support. While there’s no timeline for these additions, EWS remains a priority as Microsoft continues to support it, even as it shifts focus to the Microsoft Graph interface. This ensures that Thunderbird can effectively meet the needs of its user base while remaining competitive in the email client market.