Thanks for the question i guess
As of my last update in September 2021, the Azure Bot Service did not provide built-in support for configuring ADAL (Azure Active Directory Authentication Library) over MSAL (Microsoft Authentication Library). At that time, MSAL was recommended as the preferred library for handling authentication scenarios.
MSAL is a more modern and versatile library that supports both Azure AD and Microsoft identity platform (including Azure AD B2C) authentication. It is designed to work with the latest identity features and is generally more suitable for modern application development.
While ADAL was commonly used in the past, Microsoft encouraged developers to migrate to MSAL for new projects and future updates.
However, Microsoft's documentation is regularly updated to reflect the latest features and changes in their services.