Meta bug to track the implementation effort to fully support Microsoft Exchange, including authentication, email, calendar, and contacts.

I'm posting this here because I'm not sure where else to mention this and don't see anything specific to "EWS Support" in an issue.

I've seen several articles recently about Thunderbird working to implement Exchange support using EWS.

EWS is deprecated for Exchange Online and will be blocked starting October 1, 2026.
84% of exchange mailboxes are in the cloud vs on-premises based on the latest Statista information

Is implementing EWS support the correct way to enable Exchange Online mailboxes today?
Are you looking at Graph API instead?

At present, EWS is our best way to enable support for both Exchange Online and on-premise installations.

Graph API has been considered and may be considered again in future, but it currently provides narrower support than EWS and lacks some functionality for desktop applications. Even with the announcement that EWS support will be removed for Exchange Online, it's still valuable in the short term for enabling access for a wide userbase and in the long term for supporting users using on-premise installations.

Forgive me for posting here, but this is an important feature. If there's a way to avoid Outlook (I already use Thunderbird at work with our on-premise mail server, but we'll be moving to Exchange-365 in the next few months and Outlook seems to be the only choice), I'd be willing to donate an amount in that direction. Maybe it's a good idea to open a petition for this specific feature that gathers money that will be directed in implementing all these features for Exchange interoperability. I'm pretty sure I'm not the only one that is willing to donate an amount for that.

(In reply to Vasilis Lourdas from comment #3)

Forgive me for posting here, but this is an important feature. If there's a way to avoid Outlook (I already use Thunderbird at work with our on-premise mail server, but we'll be moving to Exchange-365 in the next few months and Outlook seems to be the only choice), I'd be willing to donate an amount in that direction. Maybe it's a good idea to open a petition for this specific feature that gathers money that will be directed in implementing all these features for Exchange interoperability. I'm pretty sure I'm not the only one that is willing to donate an amount for that.

Thanks for your interest.
The feature is already well underway in its development and you can start using it with some basic functionalities in the Daily releases.
Make sure to follow our mailing lists to keep up to date with our progress.

Note that to access your Microsoft 365 email you can usually also do that through IMAP or POP3 (unless your admin disabled it).