Autenticate via Bearer authentication header?

Hello! We recently changed our TP installation so that it uses Azure AD authentication with SSO/SAML. We have some C# .net applications that connects to TP via the REST API. Would it be possible to authenticate via the Microsoft Identity Framework?

I did some tests using the AcquireTokenInteractive method against the TargetProcess app in Azure AD, and has succeded in getting an access token. However, this token is not respected by TP when added to the headers (Bearer).

Would it be possible to use this approach or is it TP's own access tokens that is the only solution?