Hi, Rodrigo.
Thank you for contacting the Microsoft community.
As we understand from your post, you would like to update the Microsoft account associated with your Certification Profile, as you have forgotten the credentials to access your Certificates. We are happy to help!
To properly assist you, we have sent you a Private Message requesting more information. Keep in mind that this is a public forum, so it would be best not to share any personal information outside of the Private Message.
To use the Private Message feature, please look at the right side of the page and click the icon seen in the image below:

We are looking forward to your response. If we do not receive a response, the case will be closed and locked after two business days.
Sincerely,