In order for a service user to use a service (email, etc.), the user must have the right to use the service.
Here is the procedure below to authorize users.

  1.Click "Users" in your control Panel.

  2.Select the user to authorize.

  3.Select "Add Service" at the bottom of the page.

  4.Check the Service to authorize in "Assign Services".

  5.Fill in the setting forms for each service.