Thunderbird Community Forum

I have been using ThunderBird on Linux Mint for some time now. I am using Outlook.com for emails, calendar and contacts and I sync with another laptop and mobile phone. All fine until a few days ago when I noticed calendar events were not syncing with my phone. I found one calendar event in ThunderBird had an error when I manually synced with TbSync. The error report did not say anything specific. I deleted this calendar event and TbSync ran successfully uploading 2 events that it had not uploaded due to the calendar sync error. I then wanted to manually recreate this calendar event in ThunderBird. When I clicked on "New Event", the Calendar New Event pop-up window did not appear. When I minimised the ThunderBird window, the New Events was not behind it. The ThunderBird icon pinned to the panel had a "2" in the corner. When I hovered over the ThunderBird icon in the panel, it showed both the ThunderBird window and New Event window preview. When I selected the New Event preview window in the panel, it still did not become visible. All I could do with with New Event preview window in the panel was click in the 'X' to close it. I checked for Lightning Calendar Tab add-on updates. It was up to date. I check the settings. All OK. I disabled and enabled this add-on. Still not working. My Windows habits made me shutdown and restart my device. Still Not working. When I checked the other ThunderBird functions, New Event pop-up windows appeared for Emails and Contacts but not Tasks which had the same symptoms as the Calendar.

All the folders, Inbox included, disappeared from one of my outlook accounts. It's OK everywhere else so I decided to remove and re-add the account in Thunderbird but now I can't add it again.

I get the error. "Authentication failed. Please check the username and password Exchange auth error"

I know the Username and Password is correct.

Solution appreciated, please.

My contacts address book is provided by Apple iCloud, of which I have added contacts with avatars for every contact I've received legitimate emails from. However, Thunderbird fails to render these avatars. The result looks like the attachment. Perhaps Apple is using HEIC for them?

A search showed that others have experienced this same error message, but as far as I can tell, they all were unable to access their email. These messages began appearing about a month ago. They pop up in Troubleshooting Mode. They did not in Windows Safe Mode. AVG and ZoneAlarm are not the culprits.

When there is an update available for Thunderbird, I no longer get the prompt window automatically opening to tell me.

I have my Settings, General, Updates set to Check for updates, but let me choose whether to install them. (see attached screenshot)

This worked in the past but after an update (can't remember which one), this stopped working.

I have my Update Settings set in Firefox to the exact same and it always automatically opens a prompt window when there is an update due, as does all my other software, so is there something set differently in my Firefox settings compared to my Thunderbird settings?

Is there something in the Firefox about:config settings that is possibly switched on but it is not switched on in Thunderbird about:config settings that is preventing Thunderbird automatically opening an update window?

Is there something different in the registry entries or values in a file?

I know that I can manually select Help, About Thunderbird and the prompt window will show any updates available but we don't always remember to check and that's why the automatic prompt works so well!

I am running Thunderbird Version 147.0.1 (64-bit) currently on the release update channel.

Any suggestions would be helpful.

Thanks.