You can configure an Autonomous Database instance for Microsoft Entra ID users to connect using Entra ID (Azure AD) OAuth2 tokens.

• About Integrating Oracle Autonomous Database with Microsoft Entra ID
  Oracle Autonomous Database and Microsoft Entra ID can be configured to allow users and applications to connect to the database using their Entra ID credentials.
• Enable Microsoft Entra ID Authentication on Autonomous Database
  A Microsoft Entra ID administrator and an Autonomous Database administrator perform steps to configure Entra ID authentication on Autonomous Database.
• Role and Schema Mapping for Entra ID Authentication on Autonomous Database
  Microsoft Entra ID (Azure AD) users are mapped to one database schema and optionally to one or more database roles. After mapping Entra ID users, user can connect to the Autonomous Database instance.
• Microsoft Entra ID Client Configuration and Access for Autonomous Database
  After you configure Entra ID on your Autonomous Database and you map Entra ID users, there are numerous ways that a user can configure a client to the Autonomous Database instance using Entra ID tokens.
• Testing the Accessibility of the Entra ID Endpoint
  You must ensure that your Oracle Database can access the Entra ID endpoint.