"Low bandwidth" mode
Create a mode for situations where you have low bandwidth (in-flight and public Wi-Fi, for example) so the application doesn't become unresponsive by trying to sync shared calendars, index searches etc.
Customer experiencing slowness email access over slow network , especially large mailbox with multiple folders.
As a mailbox gets larger, customer do need additional flexibility to determine what folders to cahce especially for frequent travelers. Microsoft should consider to allow users to select folders they interested most to sync instead of default entire mailbox. So, they can get better performance over slow network.