Comment 13 for bug 615631

i'm having the same problem, but (strangely) one only one of two identically-configured machines.

Both are running Ubuntu 10.10, Thunderbird (aka Shredder) version 3.1.9 pre, Lightning 1.0b2, Provider for Google Calendar 0.7.1, and provider_for_microsoft_exchange-0.12. Both are connecting to the same (3rd-party hosted) Exchange server used by my employer. Both machines connect to the Exchange servier via the public Internet.

On one machine i can accept/decline invitations as expected (by clicking a button in the message window, response goes only to the organizer). On the other machine, when i accept/decline, the invitation is sent anew to all the original recipients, from me. Deadly for "all staff" meetings.

It appears, as Sven noted above, that the "Inviations" link in the status bar works appropriately on the machine that otherwise exhibits the problem.