SMB stopped working on windows 2003 server. Macs and scanners using SMB fail to connect

Posted on 2007-08-06
Last Modified: 2013-12-27
Hello all, I am completely stumped on this one.

I have a domain that is running two windows 2003 SP 2 servers and both servers are domain controllers.
Server1 is the primary windows 2003 small business server and server 2 is windows 2003 enterprise and is used as a file server and a BES server. Server2 has File Server for Macintosh installed and started.

I setup Mac users with a shared folder 2 months ago and it has worked fine until Friday Afternoon at 1:45 PM. The Mac users connect by smb://servername/sharename, they enter their user info domain name  username = domainname/user, and password.

all of a sudden on Friday no users could connect to the server via SMB. This includes Mac's and scanners that connect with SMB.

I went through all the documentation for connecting macs to a share, I have disabled "digitally signed communication" on all the servers.

I can still connect to the server shares with a PC. I can  ping the server from the Macs, I can resolve the server name from the Macs, I also enabled audits on the folders to pickup errors.

on the server I get an error 529 unknown username or bad password.

Hope someone else has seen this same issue

Thanks so much

Question by:pjinlaok
    LVL 70

    Accepted Solution

    Check that in the Domain Controller Security Policy (as opposed to the Domain security policy), you have disabled "Digitally sign client communication (always)"

    Author Comment

    Hi KCTS,

    Thanks for replying to my question. Yes I have already create a Linked GPO called SMB signing disabled. I made this change about 4 hours ago and then ran gpupdate.exe /flush.  

    I have found a work around, but I have no idea why this would have changed in the middle of the day on Friday.

    I use the Konica BIZHUB printer/scanner/copier and in the scanner configuration you can setup scanned images to send to a shared folder on the network over SMB. Before I would have to use the username domainname\username and now it will only accept just username.

    This also changed on the Macs. I used to have to put the domain name before the username.

    I still can't figure out why this would have changed in the middle of the day and I am wondering if it will randomly change back.

    What do you think could have caused this?



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