Hi Mario,
Thank you for contacting us here at Microsoft’s Community.
As we understand from your Post, you want to reach the Microsoft Certified: DevOps Engineer Expert. We are more than happy to help you with this inquiry!
For you to get a Certificate with the AZ – 400 Exam, there is a path you can take: You can do any of these Exams in the next 2 years to obtain the certificate.
Complete one of these Certifications:
Complete one Exam:
Earn the Certificate.
If you need training material, you can visit the Certificate website here, scroll down and select the way to prepare that you prefer in the next icon:

However, you can keep checking these links to see any updates about Role Base Certifications Updates:
Please let us know if the information was useful and if you need additional assistance. We wish we could be of more help, and if any additional assistance is needed, rest assured that we will be happy to jump in and look.
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Let us know if you have other questions.
Kindly,