As usual, he is exactly right. Of course, Sandeep has been using Mainpine boards for a while.
Make sure a couple of things on the server are set correctly:
You need to ensure that the Fax Service Manager is set up correctly with the IQFSP drivers. You can find it in a few places but best to use Fax Service Manager located in Administrative Tools. Once open, go to Devices and Providers and expand Devices. You only want to look at and edit the ones that have IQFSP in their names. It isn't quite intuitive that that the lines with Modem in their names aren't the ones you want. You can put a hint in description. Then in one of them, select properties and make sure Send Faxes is checked.
You want to make sure there is a fax printer shared in the Printers folder and it is shared. It is best to ensure that Listed in Directory is checked as well.
Always good to have at least 16 print drivers. (yes, some are redirected) If you can't get it to work, you have a few options.
1. Sandeep can remote in and set it up. 2. I can remote in and set it up. 3. Support is excellent, and they can remote in and walk you through it.