Sharing network folder on Mac host, but is not authenticated in Windows guest.

On my Mac I connect to our company's network folders. To do this I have to authenticate with my username/password.
I have no idea about the network that the company uses, it's 100% PC's here except for my Mac so I'm sure it's something windows-specific they use.
Anyway, I was pleased to see, that after Installing Windows 7 with Parallels 14, that those network drives also appear in the file manager in Windows.
However, I have no write permissions in Windows when I browse the network drives. I can't create any file, or edit any file. I guess that the Windows system don't get the authentication details that macOS has?
Is there anything I can do about this, either in my Mac, in Parallels, or in Windows?