Thunderbird Support Forum

I have a custom domain (me@mydomain.com) with email / contacts / calendar hosted by Google Workspace. I initially managed to add both the email and calendar account to Thunderbird but recently the calendar stopped syncing.

I tried to fix the problem by first removing the calendar account. This did not work because the 'Create New Calendar' -> 'On the Network' account wizard does not prompt me for the Google OAuth2 login page but just asks me for a password and fails. I tried to supply several 'Location:' URLs like gmail.com, calendar/accounts.google.com but none lead to the Google OAuth2 page.

Finally I removed the email account too and re-added it. During the new account setup workflow Thunderbird seems to look for calendars too but failed to find any...

How do I proceed? How are you supposed to set up a Google Calendar on a custom domain using the OAuth2 sign-in procedure?

Hello! I'm trying to subscribe to the calendar at this link: webcal://github.com/othyn/go-calendar/releases/latest/download/gocal__community_day.ics

But when I add the calendar to Thunderbird using New Calendar... > On The Network, it resolves that URL to this very long different URL: https://objects.githubusercontent.com/github-production-release-asset-2e65be/580172601/b8d41b00-ad34-4a4f-937b-55ab6a554213?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=releaseassetproduction%2F20240625%2Fus-east-1%2Fs3%2Faws4_request&X-Amz-Date=20240625T114538Z&X-Amz-Expires=300&X-Amz-Signature=10a1c88bd26110f81b16dd6f839ce758de482cc6c450135e518550bb3eed5840&X-Amz-SignedHeaders=host&actor_id=0&key_id=0&repo_id=580172601&response-content-disposition=attachment%3B%20filename%3Dgocal__pokemon_spotlight_hour.ics&response-content-type=application%2Foctet-stream

The resulting calendar then works for one day but then disables itself and cannot be re-enabled (if I try to enable the calendar, it immediately disables itself again). I think this is happening because the calendar at the webcal link updates to a new file every day, so the specific link that Thunderbird resolves to becomes invalid on a daily basis. Other calendar applications that I use (like the iOS calendar app and the web interface for mailbox.org) do not resolve the link (they just leave it as webcal://github.com/othyn/go-calendar/releases/latest/download/gocal__community_day.ics) and they work fine, which is why I think the link resolution is causing the issue.

Is there a way to get this type of webcal link to work with Thunderbird?

I also filed a bug report here https://bugzilla.mozilla.org/show_bug.cgi?id=1906077

I have used Thunderbird for many years. I had a problem viewing a jpg file that I couldn't resolve and decided to uninstall Thunderbid to install it again. Mail is working smoothly but I can't access my multi-year Calendar. I've tried several alternatives with no solution and I really need help please. I'm in Portugal and I'm Portuguese. My English is Google Translate's English. Thank you.

Thunderbird version 115.12.2

How can we keep the month calendar visible in the Today Pane?

The option mentioned here seems gone: https://support.mozilla.org/en-US/questions/1420812

This continues to be a problem in version 115.12.2. It seems to happen only with older events rather than current ones. Clicking the X closes the reminder but it pops up later. I tried changing the event to turn off reminders but that didn't work. It doesn't accept the change. The only permanent solution is to delete the event from the calendar. I see this problem goes back many versions. It's time to fix this.

Clocks went back one hour in Santiago, Chile last week and Thunderbird does not recognise the new time, although Windows (10) does.

The calendar line show the current time to be one hour ahead of the time on Windows; i.e., the Windows time has updated correctly, but the calendar time has not. Adding non-local events to the calendar causes them to be displayed one hour ahead of the correct time.

Changing the calendar setting to use the system timezone, or use America/Santiago has no effect that I can see.

Typing Date() in the error console of Thunderbird gives the correct time, as per Windows.

This also happened in the last time change here in Chile.

How can I fix the Calendar to see the same time as Thunderbird and Windows?

My calendar screen stretch blank screen to the end. If I use 2 screens it is better. It still stretch through second second. Bu I still have Monday, Tuesday and Wednesday. The rest is gone.

The problem go away when I use troubleshoot mode.

Please help me and give me advice.

Regards, Harris

Thunderbird 115.6.1 (32-bit) on Win 10 and Win 11, local calendar, no email invites are sent to the listed Attendees. Correct email is entered on Calendar/Properties/Email and Notify attendees is ticked on New Event dialogue. Attendees are correctly entered under New Event/Invite Attendees. After clicking Save and Close, there is no Invitation email record in "Sent" emails and the Attendees do not receive email invitations. The event *is* saved in the originator's calendar.

The invites were correctly sent on the Win 10 PC up until TB version 113 (?), when they stopped working after the update (I think). Eventually email and calendar data were transferred to a fresh TB installation on a Win 11 PC, but the invites are still not sent.

The only difference that I can see between this non-email-invite-sending version of TB on a WIn 11 PC and another Win 10 PC where the invites are sent, is that "Troubleshooting Information/Force Email Scheduling" is set to true on the non-working version and is blank on the working one. Clues where to look next?

After the update to 115.12.2 (64-bit) installed, I made a couple of changes to tasks and TB went sideways and crashed, and continued to crash upon startup every time I restarted, even after a reboot. So, I copied a backup of my AppData\Roaming\Thunderbird directory onto the TB AppData\Roaming\Thunderbird dir. Now TB starts, but I have only Mail and I see no way to get Calendar/Tasks back. How do I do that?

We've just started having an issue with Thunderbird continually prompting for Calendar passwords, but not remembering them. IMAP and SMTP seem to be retained ok. Additionally, if we just skip past the prompts (we are using around 5 different calendars), and just go and click the "Enable" button....they open just fine and we don't get any prompts, until we close and re-open Thunderbird. We're running 115.12.1 on Windows 10, 11 and Server 2022 Datacenter. It's not a devastating problem, but a little tedious for some of our users that open and close their Thunderbird a lot during the day. We are running "Smartermail" V8909 from Smarter Tools as our mail server. Thanks in advance!

Hello! I have linked my smartphone with the add-on: Provider for Google Calendar. How can I now transfer my existing appointments to the Google Calendar? I tried to export the existing appointments and then to import it into Google Calendar. Unfortunately, this was not possible because not a single appointment from the existing calendar is exported. I just get an empty .ics file. Any help? Please! Martin

I invited someone to an appointment, but screwed up the repetition parameters. I then cancelled that appointment.

The person I invited accepted the original (screwed up) appointment but did not process any emails to cancel the meetings. How can they edit / delete appointments that they did not themselves set up? You can see how messed up the calendar is with the erroneous entries...

My calendar stopped syncing one way: when I add an event in Thunderbird, it does not appear in Google calendar. It worked fine until about a month ago. I am using version 115.11.1

I am running Thunderbird 115.11.1 on Windows 11 and no matter what I do I simply cannot send a calendar invitation. I click to create a new event, I add the email addresses of the attendees, I make sure to click the checkbox to send out invitations and as soon as I click Save and close nothing happens other than the addition of the event to my own calendar.

Yes, I have checked whether my email address is included in the calendar settings. Additionally, there is nothing in the Sent folder after clicking Save and close.

I can edit and add notes in the description of self-created calendar events. However, invitations are not editable. Is there a way around that, perhaps an extension that you know of? ("Tasks" are not an alternative here for me.)

In the past I had used Thunderbird for both email and calendar for multiple accounts. I just downloaded Thunderbird onto my laptop (PC running Windows 11) and added all of my accounts and they are all synced. However, I can't edit or delete any event from any of those accounts directly in Thunderbird, although if I make changes on a different device they will sync and update properly. I never had this problem when I used Thunderbird before. I didn't see any permission settings that would allow me to do this so I'm stuck. Any suggestions? Thanks!

I'm using thunderbird 115.10.1 on Ubuntu Linux. I've set up a second calendar and associated it with an email account hosted by Polaris Mail. That email address has worked fine within thunderbird for everything else for a long time, but I only recently associated it with a calendar. When I get a meeting invite, for example from a gmail user, and accept that invite, selecting "send a response now", no message ever arrives at the email of the inviter and no email ends up in any of my folders (drafts or sent). It is like nothing happens. The event *is* accepted and added to the calendar, but no respose is created or sent. I have another email account and calendar and meeting acceptances and responses seem to work fine.

I've looked at all the settings I can find and they seem appropriate and analogous to those with the working email/calendar. The correct email address appears in the calendar properties opened by right-clicking on the Calendar and selecting properties.

Any help? Thanks.

In Outlook you can forward an appointment that is not created by yourself to someone else. In Thunderbird this option seems not available, or is it? Adding attendees to an event that you did not create yourself does not work.