Nslookup and ping work differently when resolving names/ip addresses on Windows.

Ping can use previously failed cached record,  nslookup doesn’t use the cache, it queries the DNS server directly

Try this:

on the client machine,  run  ipconfig /flushdns

Problem:

After creating share on Windows 2016 server (workgroup enviroment), the users can not access the shares. The permissions are correct.

It say “\\machinename is not accessible. You might not have permission to use this network resource. Contact the administrator of this server to find out if you have access permissions.”

Solutions:

Go to “Change advanced sharing settings”

Check “turn off password protected sharing”