Cannot use Windows Explorer in Windows 10 Pro. Version 1903 from work group PC to see a folder share on Windows Active Directory computer.
We have some test computers that are on their own network and we must configure the host file to use DNS hostnames those computers can recognize and access the A.D. names for folder sharing purposes. The folder share access/process works from Windows 10 Pro. computers with version 1803; but if those computers are upgraded to Windows 10 Pro. version 1903 they can no longer access the folder share from the A.D. computers. The Windows 10 Pro. computers that have version 1903 are workgroup PC's.
Earlier we would use the UNC (Universal Naming Convention, start-Run - \\PCNAmeHere) and then one is prompted to enter the Active Directory username/password. Then they have access to the folder share. When the PC is upgraded to version 1903 they are no longer prompted to enter a username/password.
The PC can still ping the hostname that is indicated in the host file and its IP address; but, explorer cannot see the shared folder from Active Directory. Instead an erro comes up stating "Windows Cannot Access \\Servername_Here\Shared_FolderHEre". error code 0x80070035.
My question is what can I do to get the folder shares accessible to the Windows 10 Pro. computers that have version 1903? Other already existing Windows 10 PC's that are still working have an earlier version .. 1709, 1803.