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I've used thunderbird with gmx calendar for many years. Apart from persistently forgetting its "stored" password, I've never had any problems.

But about a month ago, I started getting a message that the servier wants to redirect from the usually-correct https://calendar.gmx.com/begenda/dav/[my name]@gmx.com/calendar to gmx.com.

At first I didn't accept the redirection, but the calendar stopped syncing. Then when I did accept the redirection, the calendar disabled itself altogether. Using the ENABLE button didin't help.

The GMX calendar itself is working fine:

• I can access by logging in at gmx.com and the organiser tab
• the calendar still works fine via my lineageOS phone
• if I go to https://calendar.gmx.com/begenda/dav/[my name]@gmx.com/calendar while still logged in, I can download a raw list of all of my events

GMX support suggested removing the calendar from firefox, changing the password on gmx and adding it up again. Mostly it was not possible to add it, with thunderbird giving the message:

https://user-media-prod-cdn.itsre-sumo.mozilla.net/uploads/images/2022-04-16-00-57-44-0e6dec.png

That long location is the location suggested as correct in gmx thunderbird FAQ. But I also tried setting the location as gmx.com or caldav.gmx.com with the same result.

Eventually after trying on numerous occasions I managed to add the calendar again, but in less than a day I was back to getting the redirect message and the calendar not syncing.

I've removed the gmx calendar, reinstalled thunderbird and tried to add the calendar again. At the moment it will not add using any of the locations mentioned above. But of course, I can still access it via gmx.com and my lineageOS mobile.

Also tried adding with thunderbird in troubleshooting mode but no difference.

I subsequently tried two suggested addons (now disabled because they did not help):

https://user-media-prod-cdn.itsre-sumo.mozilla.net/uploads/images/2022-04-16-01-13-26-d28ffe.png

• Thunderbird help says 91.8.0 and it's running on windows 10 64 bit.
• I don't have any caldav-related addons (nor did I need any in the many years when gmx calandar was working properly in thunderbird

I do have these addons (but the troubleshooting mode test should have eliminated them)

https://user-media-prod-cdn.itsre-sumo.mozilla.net/uploads/images/2022-04-16-01-19-55-b59057.png

What to try next? I'm only interested in the calendar, not gmx email and I'd prefer to see my calendar in thunderbird than at gmx.com

I added a CalDav calendar to Thunderbird that is hosted on a Nextcloud instance. While the calendar view looks decent, the tasks view is completely bloated with old, already completed tasks, some even from 2023. I selected "open tasks" or "current tasks" (? German translation) from the menu on the left side. It's not that all of the tasks are misclassified: When I go to completed tasks, there are hundreds of (correctly) completed tasks listed, but still.

Furthermore, the sub tasks of a main task are not grouped. Is this a known limitation or am I missing some configuration?

In general, as of now, the task view is pretty unusable for me. Anything that I can do to help debugging this?

Hello, In Thunderbird (Vers. 115.9, OS Linux Zorin OS 17) I can integrate a calendar from a Mailbox.org account as described here(https://kb.mailbox.org/de/privat/adressbuch-und-kalender/caldav-clients-outlook-thunderbird-macos-evolution-kontact/). Everything works fine. If I now want to import a 2nd calendar from another mailbox.org account, this does not work. I can go through the process normally, but the 2nd calendar is not displayed. Does anyone have the same problem? It can't be that Thunderbird is not able to integrate 2 calendars ? Many thanks for your help

This morning when I opened Thunderbird all entries that have other participants invited have disappeared. The entries without other participants are still there. I am not aware of an update. I can create new events and invite people. It seems the data is just gone somehow, and I somehow need it back.

OS: Ubuntu 22.04 Thunderbird: 91.11.0 (64-bit) How to reproduce: no idea

Will there ever be an option in the calendar to schedule links to video conferencing platforms like zoom or teams or google meet?

Lot's of other 'smart' calendars have this as an option. For example, when I use google calendar on a browser there is a zoom plugin so when I schedule an appointment it automatically generates a meeting invite for the attendees and put the meeting on my zoom app.

I know that this is probably reliant more on the companies [Google, Microsoft, Zoom] to make an extension for this, but it would be great if this could be implemented in the future.

I'm having a really annoying problem where Calendar events, even tho they have reminders/notifications properly set up, just don't actually trigger these notifications when they're supposed to.

Are there any logs or debug settings or anything I can do to troubleshoot this further? All of the direct UI settings are definitely set up correctly. And there are other events for which notifications work fine, so it's not that notifications are broken altogether

Is there any way to select other than the "home" calendar as standard? Have tried to change order in the calendar setting, but when I accept a meeting invitation it always place the meeting in the home calendar. I would like to select the syncronized Google calendar.

The syncronization with Google calender works perfect when manual enter something.

Best regards /Mike

Referring to this archived post, https://support.mozilla.org/en-US/questions/1304213.

I have the same problem - very difficult to find "TODAY" on my calendar. Mozilla - may I suggest highligh of "Today" as an option people can easily set in Calendar settings?

Post reply provides info on changing the userChrome.css, then says to

"Toggle toolkit.legacyUserProfileCustomizations.stylesheets to true in Config. editor"

How/where do I toggle this? Using TB 91.11.0

Thanks, Greg

I am using Thunderbird Lightening Calendar on MacBook Air. First it worked fine but now when I click on INVITE ATTENDEES the usual box to add invitees is hidden or not displayed. see attached image

Greetings - since using T-bird calendar for several years now, there is a recurring bug that is most annoying. On a regular basis, the calendar preferences reset to Monday start which has created some meeting/scheduling issues. Please fix this.

This question hints that there might be a way to subscribe directly to the Google holiday calendar rather than downloading and importing it. Does anyone know how to do this?

Thanks!

I want to submit a feature suggestion for Thunderbird, but I don't know where to put it.

My idea is that we could name each reminder for the event and that way we would know which reminder has just gone off. If you have 3 or so reminders for each event, then when the event appears you don't know if it's your day before, 2hrs before 1hr before etc. It also means that you can't write something like "that event is tomorrow" or "leave in 1hr" for example. So I would like to be able to name each reminder.

It's a pity that we reached version 102.1.2 and till now a common problem has not been solved. In email composing window when misstype a word there is the red indicator for mistakes and then by right clicking we get the correct proposed words. In event creation we get only the red indicator for mistakes. Nothing more. It's a pity a so much advertised version to lack such a basic feauture.

I am not sure if I am using the correct verbage but here goes: When I launch Thunderbird a panel opens in the upper left with all events that are in the past and not yet dismissed and all events for the current day that are not dismissed. I was in a hurry and instead of minimizing it I clicked the red x in the right upper corner. Now it does not dislay on startup and I cannot find a way to get it back since it has been there since I installed Thunderbird. I believe the correct name is Event Preview Pane but not sure. Any help is greatly appreciated.