Exchange data usage excessive since iOS9 upgrade

Ditto here - I have the exact same problem. This needs to be fixed. I turned off WiFi assist but that isn't the issue as it is specifically Exchange that is showing massive data usage. Is there a way to stop auto-downloading attachments when not on a WiFi network?

Thanks

Try to turn off wifi assist.

Here is how.

http://www.igeeksblog.com/how-to-enable-wi-fi-assist-in-ios-9-on-iphone-and-ipad /

hope it helps 🙂

It is not a problem of using wifi assist, It is a problem of using to much data. When traveling out of the USA, Cellular data may be the only way to receive information. Currently the ATT Passport plan provides for 120 MB of data for 30 days. In the first 3 days I have used over 60 MB of data. 45 MB of this data can be traced back to Exchange accounts under system services. Trust me, I have tried turning off everything I can so nothing is operating in the background or drawing data without me requesting it specifically.

Any help would be appreciated..

Now I see why the IPhone is a big seller in areas of the world where access to data is cheap and plentiful, but not a relevant product where data is still controlled an expensive.

This is an age-old bug in the MS Exchange ActiveSync protocol. The server can get out of sync with the client (your phone), and it keeps trying over and over to re-sync. To fix it, delete the MS Exchange account, or go to Settings/Mail, Contacts, Calendars, tap on it, and turn off all the switches. Then reboot the phone by holding HOME and SLEEP until an Apple logo appears.

For the next step first connect to a WiFi hotspot so you don't run up cellular data charges, and connect to power so WiFi doesn't shut off when the phone goes to sleep. Then add the account back or turn it back on. It will take a while to resync, which is why you need the WiFi connection. Once it has finished re-syncing it should be OK.

Lawrence,

Thank you for the info. What tripped me up is that mail showed it had used 743KB. I had no idea that the phone could suck down data so quickly and not be doing anything.

When I am near wifi hotspot will try your process to resynch.

Thanks again!