I had been looking for a simple stand-alone SFTP server that could run on Windows Server 2003/2008 and didn’t require an installation or reboot. The best solution I’ve found so far is CORE SFTP Server available here.
I’ve tested this SFTP server with Cisco Communications Manager 9.1 (CallManager) and Unity Connection 9.1 with good results.
After using this SFTP server a few more times it seems as though it works some of the time. I would highly recommend either using a Linux based SFTP or SilverSHielD for Windows (mentioned in a previous post).