Please have a look at my article and check your IIS settings are correct and then if they are, follow the HTTP 500 error section and see if that helps:
With cloud storage prices going down a growing number of SMBs start to use it for backup storage. Unfortunately, business data volume rarely fits the average Internet speed. This article provides an overview of main Internet speed challenges and reveals backup best practices.
This video demonstrates how to sync Microsoft Exchange Public Folders with smartphones using CodeTwo Exchange Sync and Exchange ActiveSync.
To learn more about CodeTwo Exchange Sync and download the free trial, go to: http://www.codetwo.com/excha…