IPhone Mail App randomly delete emails and re-download again RRS feed

  • Question

  • I'am a developer of a third party App.

    Our App fetch emails from user's account intermittently via Exchange Web Services.

    One of our user, after connected to office365 exchange server via our app, emails  in his Mail App from the current day and part of the previous day are gone and the Mail App is re-download all emails again.

    It stops once the user disconnect our app.

    I am wondering if our EWS calls affect the EAS?
    Thursday, June 27, 2013 7:46 AM