Once this mailbox has been set as the primary profile, then go to tools => Rules and Alerts => New Rule => Start from a Blank Rule then select “check messages when they arrive” => Next=> then select “Where my name is in the To or Cc box” = Next => then select “Have server reply using a Specific Message” on the Step2 box underneath, click “a specific template” then compose the autoreply on the body of the email and put the subject you want on the sibject field. Once completed composing the autoreply dont forget to click “Save and Close”. => Next => Next => Finish.
Close your outlook and let someone try to send a test email to the “secondary mailbox”. They should be able to receive an autoreply regardless if your outlook is closed.
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