For the client credentials grant, you must create an application user on your Dynamics 365 web instance.

Take the following steps to create an application user.

  1. Logon to your Dynamics 365 instance.
  2. From the application dropdown, select Settings and then Security.
  3. From Security, click Users.
  4. From Users, click New.
  5. Switch from the standard User form to the User: Application User form by clicking the User dropdown and selecting Application User.
  6. Enter the following details in the User: Application User form.
    Note: The Application ID URI and Azure AD Object ID fields are non-editable fields and may be left blank.
    • Enter a user name.
    • Enter the client ID of your application in the Application ID field.
    • Enter a full name and primary email in the fields provided.
  7. Save the profile of the application user by clicking the save icon in the lower-right corner of the browser.

Results:

You have successfully created an application user to implement the client credentials grant.