Are there plans for the office365 probe to support certificate-based authentication?
Release : 20.4
At this time there are no plans for this.
To access the Graph APIs provided by Microsoft, we generate a Bearer Token first and use that token in the subsequent API calls (OAuth2). The API to generate the Bearer Token uses client secrets and certificates are not supported.
https://learn.microsoft.com/en-us/graph/auth/auth-concepts