I have several fairly identical server 2012 R2 virtual machines. On one, I can't map a network drive that I can map from the others. The VMs are all on the same VMware host, with IPs from the same segment. The one machine that won't map this particular resource (a shared drive created by the institution) does map other shared drives on resources I control.
To debug this, I tested mapping from the command line. Again, all 4 other server 2012R2 machines mapped fine; this one machine fails with System Error 86: "The specified network password is not correct". But the password is correct, because it works for all 4 other machines. It is not a typo, because I'm copying and pasting to the command line from a saved text file.
net use p: "\\FQDN\Directory$\Subdir1\subdir2" /user:domain-name\user-name password
(I must use quotes because Subdir2 was set up as lastname then a space then initial of first name.)
There must be some setting in this one server for networking that is breaking the authentication process. It is not a simple translation of the FQDN because it pings the resource fine, and also fails if I use the IP address of the resource.
I don't have access to the log files on the destination server; just the event files on the client server.
Anyone know what settings might be doing this, or how to get some verbose logging that will tell me what is going on.
I have already set security options: Network security: LAN Manager authentication level: "Send LM & NTLM - use NTLMv2 session security if negotiated".