This is a long overdue feature which will allow Dataverse plug-ins to connect to Azure resources (e.g. Azure Key Vault) using managed identities, eliminating the need for credential management and enhancing security. It currently is available in public preview but GA is expected for November 2024
You will need to create a managed identity record in Dataverse and link it ot your specific plugin assembly - for more details take a look at Set up managed identity for Power Platform (Preview) and Power Platform managed identity overview (Preview) for more details.
In your plugin, you will need to the implement the IManagedIdentityService interface which allows your plugins to interact with managed identities. Using this interface, your plugin can request an access token for a specific Azure resource. I asked Copilot to generate the code for this below but did not check it yet ...
References:
