User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:54.0) Gecko/20100101 Firefox/54.0 Build ID: 20170424145525 Steps to reproduce: Receive email containing the invite. (invite.ics) Actual results: Light blue bar, saying "No writable calendars are configured for invitations, please check the calendar properties". Expected results: Should have allowed me to add this invite to my calendar as it used to do. Thunderbird: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:52.0) Gecko/20100101 Thunderbird/52.0.1 ID:20170413214957 CSet: 3b5381b7085b2edb9f4f8176d7f023cfd74e4f63 Lightning: 126.96.36.199 Provider for Google Calendar: 3.3
Please make sure your calendar is writable and an email identity is associated to it - check the respective calendar properties . Iirc, only the primary calendar would support invitations. Philipp, does there exist an up-to-date documentation about invitation support for the gdata provider?  https://support.mozilla.org/en-US/kb/changing-calendar-preferences
There are not many docs about the gdata provider, especially not for this case. Indeed only the primary calendar can be used for accepting invitations. Worcester12345, are you using the primary calendar?
(In reply to Philipp Kewisch [:Fallen] from comment #2) > There are not many docs about the gdata provider, especially not for this > case. Indeed only the primary calendar can be used for accepting > invitations. Worcester12345, are you using the primary calendar? Where is this determined? If you give some guidance, I can get you the answer to that. Still a problem. I've just been manually entering info, as former calendar function is kind of broken. Thanks.