Issues with msn email and gmail syncing between iphone and ipad

[llmichel]

I have a user that has an iphone 4s and also a new ipad. She has msn email on both devices but when she reads an email on the iphone or deletes one it does not show as read or deleted on the ipad and vise versa. It syncs fine with her exchange account but not with msn email of gmail. Settings are set the same on both devices. Any ideas of why it does not update the other device? Thank you for any insite that you can provide