Windows 2012 R2 domain with a mix of Windows 7 Pro and Windows 10 Pro computers. All 9 computers are 64bit, and fully patched. All computers have the same suite of software installed including antivirus. All computers and users have the same permissions on the network. In essence, they're all pretty much configured the same.
When the Konica Minolta BizHub 363 was installed, scanning to the desktop was setup using Konica's FTP utility using anonymous FTP with each computer having a static IP address. I'm in the process of changing the scanning to SMB with computers using DHCP IP addresses.
I've been successful changing to SMB scanning with 6 out of 9 computers. The FTP utility was uninstalled, and the IP address is now DHCP. But...it's been rocky getting SMB scanning on those 6 to work. There's C:\SCANS folder on all computers. I created a regular user, named Scanuser with a password, and added it to the Share (read/write) and NTFS permissions (Full Control) for the C:\SCANS folder. I changed the scanning on the Konica from FTP to SMB scanning for those computer.
That worked for several of the 6 computers. For the rest of the 6 I had to add "Everyone" to both the Share and NTFS permissions.
Believe me that I played with all permutations of the permissions. I never saw any pattern of success or why "Everyone" was needed on some computers and not others. Then there are the remaining 3 recalcitrant computers (2 Win10 and 1 Win7) where nothing has worked. The Konica just says it can't make a network connection which not very helpful.
The computers are pingable to both IP address and NETBIOS name. They all have the same Share and NTFS permissions. File sharing encryption is downgraded to 40/56 bit on all computers. The firewall shows SMB file sharing (IN) is enabled. While I'm testing I leave static IP addresses until I get SMB scanning working, so FTP scanning will still work until I get it figured out.