How do I set Up Mac Server to use for Windows File History Backups

I am trying to set up Windows File History from my PC running Windows 10 via my home LAN to a Mac Server (Mini running Sierra 10.12.6 and Server 5.3.1.) I have scoured the web, and found extensive complaints & research about this, but no resolutions. Is there a way to set up the server, and my PC, to be successful with this? The server drive is a partition exclusively for this purpose, so I can reformat into anything the Mac can still write to. I have tried ExFAT as well as HTFS+ Journaled so far.

For now, all attempts on the PC result in Error Code 0x8007054F (not specified further) for Windows Backup, and "0x80070002 The system cannot find the file specified" for Time Backup.

The Server's shared partition for this is fully available for read/write from the PC, and I can access it and read/write files and folders to it as a sharepoint from my PC without issue. Only backups fail.

As I mentioned, I have seen this problem being encountered historically for years; the best answer I found is this one: http://blog.harush.net/2012/05/windows-backup-and-mac-os-x-server.html which is well over 5 years old, and I have been unable to get it to work.

Here is a Windows Community post, again with no solution-- the person who posts indicates it is permissions-related: https://answers.microsoft.com/en-us/windows/forum/windows_7-performance/can-not- backup-windows-7-to-shared-mac-drive/4168a89c-a2fc-4350-bab2-7ec28ce155ff I've posted this question in the Windows community as well.

Thanks!