The original bug(data in Origin header) has been fixed, so I'm going to close this, as it's gotten unwieldy. We do have other regressions and new bugs caused by Microsoft, so if you are experiencing any of the following you can comment... **WITH DETAILED STEPS TO REPRODUCE, PLEASE**:
**ON LINUX**, can login on 102.6.1, cannot on 102.7.1: Bug 1814536
Can login to IMAP/POP3 but **NOT SMTP** with OAuth: Bug 1775077 (note a workaround is to use basic authentication eg user/pass for SMTP only)
**On 102.7.1**, have certificate error messages with OAuth: Bug 1814824
**Profiles created prior to 102.7.1 cannot login**, but new profiles CAN: Bug 1814823
If you're experiencing something that doesn't fall into any of these categories, please check the [Microsoft OAuth Meta Bug](https://bugzil.la/1814820) and if your problem is not represented there, file a new bug. Calendar issues should be reported to the respective add-on, Thunderbird does not support Exchange calendars.
Unfortunately, these changes were required by Microsoft policy and technical changes to their OAuth system, and while reverting to 102.6.1 may temporarily solve some problems, the authentication on 102.6.1 is broken and has [other bugs](1685414) in it.
Thank you for bearing with us. We're equally frustrated with these problems and we will fix them.
The original bug(data in Origin header) has been fixed, so I'm going to close this, as it's gotten unwieldy. We do have other regressions and new bugs caused by Microsoft, so if you are experiencing any of the following you can comment... **WITH DETAILED STEPS TO REPRODUCE, PLEASE**:
**ON LINUX**, can login on 102.6.1, cannot on 102.7.1: Bug 1814536
Can login to IMAP/POP3 but **NOT SMTP** with OAuth: Bug 1775077 (note a workaround is to use basic authentication eg user/pass for SMTP only)
**On 102.7.1**, have certificate error messages with OAuth: Bug 1814824
**Profiles created prior to 102.7.1 cannot login**, but new profiles CAN: Bug 1814823
If you're experiencing something that doesn't fall into any of these categories, please check the [Microsoft OAuth Meta Bug](https:/ /bugzil. la/1814820) and if your problem is not represented there, file a new bug. Calendar issues should be reported to the respective add-on, Thunderbird does not support Exchange calendars.
Unfortunately, these changes were required by Microsoft policy and technical changes to their OAuth system, and while reverting to 102.6.1 may temporarily solve some problems, the authentication on 102.6.1 is broken and has [other bugs](1685414) in it.
Thank you for bearing with us. We're equally frustrated with these problems and we will fix them.