Thunderbird 145 adds native support for Microsoft Exchange using the EWS protocol, eliminating the need for third-party add-ons. Users can easily migrate from Outlook, with automatic detection of settings and OAuth2 authorization. Current features include email setup, folder access, message management, and support for Microsoft 365.

Microsoft is investigating a global outage affecting access to the Exchange Admin Center, designated as a critical service issue. Administrators are encountering "HTTP Error 500" when trying to log in, but some have found a workaround via a different URL. Microsoft is working on solutions and has started redirecting traffic to restore access temporarily.