Lightning Problem - No Writeable Calendars issue

For discussing the Mozilla Calendar, Sunbird and Lightning projects.
Posts: 1
Joined: May 23rd, 2019, 6:08 pm

Post Posted May 23rd, 2019, 7:12 pm

Thunderbird 60.7.0
Lightning V 6.2.7
Google Provider 4.4.2

Hopefully someone has a definitive answer for my problem.
I recently attempted to setup my calendar so that I can sync my Google Calendar. I've followed the instructions and all works as fine as far as synchronizing is concerned. The issue that I am experiencing is that when I receive a meeting invite from within Thunderbird, I get the following message: 'No writable calendars are configured for invitations Thunderbird'

So far I've not been able to find a solution to my problem. I've seen where quite a few people have reported this answer with various fixes but none have worked for me. Any help/tips would be appreciated.

Posts: 737
Joined: February 12th, 2005, 8:33 pm

Post Posted May 24th, 2019, 7:26 pm

If I understand correctly, you are able to create events in your calendar(s)? So the problem is just with invites you receive. Right?

Do you have more than one email address? If so, it's probably because you haven't received the invite on the "proper" email address. For example, by default, the only email that can be used to write in your calendar is the gmail address associated with the calendar (ex.: If the invite has been sent to or even at, Lightning tries to add the event in your Google calendar using that email... which is not authorized by default, hence the error message. Fortunately, there is a way to correct that.

What to do

– Close Thunderbird and open Google Calendar in your browser (
In the left panel, you will see a list of all your calendars.

– With your mouse, hover the name of your main calendar. Click on the three little dots open the menu, then select "Settings and Sharing".

– Under "Calendar settings" –> Share with specific people, there is only one name listed: that of your Gmail account.

– Click on "Add People". Then add your other address (, validate it (follow instructions), then give yourself all privileges.

– Close your browser window, then restart Thunderbird.

From that point, you should be able to add to your calendar invites that were sent to "
Michel Gagnon
Montréal (Québec, Canada)

Return to Calendar

Who is online

Users browsing this forum: No registered users and 1 guest