Include contact number in telephone interview calendar invite

Is it possible to put candidate telephone numbers into the calendar invite?

At the moment, the candidate's telephone number is pulled through into the body of the email that is sent to the hiring manager/interviewer and the interview calendar invite is an attachment to the email.

Subsequently, the hiring manager will open the calendar invite and accept it so it goes into their calendar, then delete or file away the email. Then when they come to the actual time of the telephone interview they struggle to search for the email which has telephone number in it.

Therefore it would be useful to have the telephone number in the calendar invite information instead.

NB: Appreciate this would not be possible for agency candidates as telephone numbers are not usually provider on the details tab when agencies submit candidates.