On 29/01/2023 18:24, Orion Poplawski wrote: > It seems that thunderbird-102.7.1-1.el8 (at least on CentOS Stream) > broke OAuth authentication with outlook.office365.com. Downgrading to > 102.4.0-1.el8 resolved the issue. > > Error console reports: > > XHR POST https://login.microsoftonline.com/common/oauth2/v2.0/token > [HTTP/1.1 400 Bad Request 293ms] > > Is anyone else seeing this? > Yes, on EL9. Downgrading to thunderbird-102.6.0-2.el9_1 fixes the issue. It looks like the exchange/outlook server need reconfiguring.... https://blog.thunderbird.net/2023/01/important-message-for-microsoft-office-365-enterprise-users/ -- Magnus Lewis-Smith Senior Linux System Administrator / Scientific Computing, RTP University of Warwick, Coventry CV4 7AL, UK https://warwick.ac.uk/research/rtp/sc/