After implementing SP22,we're having difficulty in establishing Service Call from the e-mail template NEW.It is possible to create it,only if there is an unrestricted access. How would it be possible to reverse it so as only the people in ServiceDesk would be able to create Service Call?
Are you trying to restrict it so that only people that have Service Desk accounts can create tickets via email? I don't believe that is possible. In order to create a Service Call via email they have to have a person record in Service Desk with the email address they are using to send the request in the person record.