I have a client. The owner has a new iMac from which he uses Parallels to run Quickbooks with the data file on a Windows networked PC running Windows 10.
All shared files on the Windows PC allow "Everybody" total access. All PC's on the network can see all shared folders on the Windows PC that has the Quickbook Folder "Shared".
On the iMac, bringing up Network shows the entire network, and the shared folders.
When Parallels is fired up on the iMac, the Windows PC doesn't appear. As a consequence, he can't access the Quickbooks Company File.
The network connection on the iMac is set to wireless. I've checked switching to a wired, bridged connection with the same results.
So, we have a new iMac with Parallels installed so the client can work with Quickbooks 2016 as a client of the "Host" PC where the company file is stored under a Multi-User License. But, although in the Apple OS, he can see all network PC's, the minute he fires up Parallels - Starts Windows 10 - That host machine isn't seen.
Which networking mode (Bridged, Shared or Host-Only) should I use for the virtual machine?
as you mentioned, you have probably already done this but you do need to verify the settings by checking if the iMac and the VM are on the SAME subnet and can PING each other.