Cannot sign when adding an existing email account to thunderbird

I am using thunderbird to manage my email account. I want to add an existing shared email account from office 365 server. To get in it, it is necessary to sign with a password. Every time that office is requesting this password, thunderbird immediately hide it and send a message : "All is OK, you are connected" which is wrong... How can i avoid that thunderbird send this message and let me sign ? Attached is the message ( in french)