Viewpost Sync for use with QuickBooks should be installed in the same computer location that the QuickBooks software is installed. The person installing the sync agent must have permissions to install software on the location.
So, if your QuickBooks software is installed on your local C Drive, then Viewpost Sync for use with QuickBooks should be downloaded and installed on your C Drive.
If your QuickBooks software is installed on a server, Viewpost Sync for use with QuickBooks should be installed on the server. Usually a systems administrator will need to assist in this process.
If you use a hosting service for your QuickBooks software, the hosting service will need to install Viewpost Sync for use with QuickBooks on their system.