Environment
Novell Open Enterprise Server 2015 (OES 2015) Linux
Mac OS X 10.11.5 or later
Situation
Unable to connect to OES2015 with SMBv2 from Mac OS X 10.11.5 or later
Error: "You entered an invalid username or password for the server"
The client does not prompt for username or password
Error: "You entered an invalid username or password for the server"
The client does not prompt for username or password
Resolution
Starting with Mac OS X 10.11.5, SMB signatures are required. Enable SMB Signatures on the OES2015 server with "novcifs -g yes"