I downloaded the Touchdown app since we could not get our droids to sync with our Exchange email account. Touchdown worked very well for several weeks with no hiccups. Now all of a sudden, it no longer gets new emails/appointments and gives me a message that says :TouchDown error, Host is unresolved: "name of exhange server" I was using the free trial version of the TouchDown, and it continued to work fine after the trial version expired. Now it doesn't sync at all. No settings have been altered on our network. Anyone have any idea what the fix is?