com.hierynomus.mssmb2.SMBApiException: STATUS_OTHER (0xc0000466): Authentication failed for '' using com.hierynomus.smbj.auth.NtlmAuthenticator

Question

trying to access Azure Netapps drive (Kind of network drive) using SMB protocol with smbj library.

It's working fine with user name and password (authendication). But getting following error while trying to accessing anonymously. How to address this issue?

com.hierynomus.mssmb2.SMBApiException: STATUS_OTHER (0xc0000466): Authentication failed for '' using com.hierynomus.smbj.auth.NtlmAuthenticator@2b98378d

My code is below,

SMBClient client = new SMBClient();
Connection connection = client.connect(SERVERNAME);
AuthenticationContext ac = AuthenticationContext.anonymous();                 
Session session = connection.authenticate(ac);
DiskShare share = (DiskShare)session.connectShare(SHARENAME);