Я снова скажу: читайте первоисточник.
https://msrc-blog.microsoft.com/2021/02/18/microsoft-internal-solorigate-investigation-final-update/There was no case where all repositories related to any single product or service was accessed. There was no access to the vast majority of source code. For nearly all of code repositories accessed, only a few individual files were viewed as a result of a repository search.
For a small number of repositories, there was additional access, including in some cases, downloading component source code. These repositories contained code for:
a small subset of Azure components (subsets of service, security, identity)
a small subset of Intune components
a small subset of Exchange components
The search terms used by the actor indicate the expected focus on attempting to find secrets. Our development policy prohibits secrets in code and we run automated tools to verify compliance. Because of the detected activity, we immediately initiated a verification process for current and historical branches of the repositories. We have confirmed that the repositories complied and did not contain any live, production credentials.