Okay, first of all, we need to be clear about the setup… I have a PC and a laptop, both running Windows 10 Pro. The PC is the Server, the Laptop is the client / user’s PC. Both of them are using my Microsoft account to log in, and I use my PIN on both. The Client is of course trying to access shared files on the Server.
It seems if you have the setup as described (particularly if you are using a PIN to log in), then this fix should help if you get the error “Enter Network Credentials” when trying to access shared files. I tried heaps of other fixes, but none of them worked.
TL;DR: Create a local account on the Server, then simply use that account to log in from the Client. I’m a bit surprised that this wasn’t already suggested somewhere (maybe it has and I missed it!).
I’ll get to fleshing out the specific instructions at some point….