Thunderbird Community Forum

Hello!

I am using Thunderbird 140.9.1esr (64-bit) on a Ubuntu 24.04 system. Every time I restart Thunderbird, it reverts to a little used Gmail account as the default account. I have several accounts, but my main email account is a MS365 account. I reset the setting, but every time it is restarted, the default goes back to Gmail. I have tried everything that I've found online, but cannot correct this behaviour.

Do you have any suggestions or assistance?

Many thanks!

When I try to install my account Office 365 for my association's account (XXXX@patapon95.fr) it doesn't word with Thunderbird (I can connect on Outlook on the same account). I can also connect with my personnal acount on xxxx@outlook.fr on Thunderbird.

I have two outlook mail accounts installed in Thunderbird, with the same parameters (except of course login name and password). Only the mail account installed first, works. The other only shows its inbox but no other folders or message. If I test its connection, the account seems to be properly connected.

Next to the two outlook accounts, I have three gmail accounts installed in my Thunderbird. They work without problems.

What could be the problem with the outlook accounts?