Integrate and secure email.
The resident email client on Android is, of course, Gmail, and plenty of people simply configure Gmail to pull in their enterprise accounts. That's fine if you simply want email access on the go, but for integration with Microsoft Exchange, it's lacking. TouchDown serves as a mobile client for Exchange, giving users secure access to their corporate email, calendar, contacts, tasks and notes. One of the big security holes in Android is that it lacks a fully encrypted file system – for now. TouchDown accepts all the major security policies enforced by Exchange Server, such as SD card encryption, PIN and password enforcement and password refresh. TouchDown also partitions itself, so no other applications are allowed to interact with Exchange data.