I was (and still am) in Canada so I've already taken the test.
@Nevine.Kassem took the test abroad and the test results were validated successfully.
I would recommend sending an email like this :
"Hello, I am currently outside Canada and I have received a test invitation. I know several applicants have taken the test overseas - Could you please permit me to take the test outside Canada as well? Thank you."
Do NOT say something like this :
"Hello, I'm currently outside Canada and I have received a test invitation. Could you please advise what needs to be done?"