Connecting to Microsoft D365 CE CRM with Entra ID impersonation or or an Entra ID application user is the recommended authentication method for most dox42 Online or Entra ID use cases. See Configuring the dox42 app registration in Entra ID for the steps to perform.
Note
However, in some scenarios, for example when using Microsoft Power Automate or PowerApps (see also Generating D365 CE | Dynamics CRM Documents from Flows and Power Apps), the connection via an Entra ID application user, as well as a client secret or certificate is needed.