Thanks @Jay .
At home, I couldn’t connect the Office 365 mail despite many attempts, but I managed to do it on my work PC. Curious.
I’m on the same version of Windows and I was on the same version of Legend.
That said, the emails are not recovered, all folders are empty.
By the way, I know you are in high demand, but this thread about emails remains unanswered, I am quite discouraged to see that the problem persists. https://forum.legendapp.com/d/29-bugs-with-mail-panels/13
Could you watch this?