system services exchange accounts using a lot of cellular data
The Settings - Cellular - System Services - Exchange Accounts is showing a lot of data usage on my iPhone 6. I don't know what an exchange account is. How can I stop these from drawing cellular data other than completely turning off all cellular data? I have already disabled location services on my phone because it was drawing a lot of data in the "Time & Location" category. More broadly, I have not had a problem with my phone drawing a lot of cellular data until last week when I upgraded to iOS 8.3. Is there something wrong with this software update that it is causing me to draw so much cellular data when doing nothing?
iPhone 6, iOS 8