hotmail account locked because of unknown reason

Hi all,

Since today, my daugther hotmail account is unusable because its password doesn't work even if we entered the correct one.

I tried to unlock via email, but it did send the code to her Email address :-( so, not usable and via her security question, no luck too.

I tried it also via text code, but no more luck :-(

This access is important as she used it for her school purpose end examination time frame is going to start by next Monday !!!

Is someone can help me to figure out of this issue ?

Thx,

Jean-Luc.