Hi @Imène CHABANI ,
Maybe one of the links is helpful:
Microsoft Training & Certification is supported on their own forums:
It's possible to ask questions by clicking on "Get Started" -> "Ask a Question"
or "Ask a new question >" and Learn/Cert Moderators will help you.
Microsoft Training Support Forum
Microsoft Certification - Exam Prep Resources
(If the reply was helpful please don't forget to upvote and/or accept as answer, thank you)
Regards
Andreas Baumgarten