I ran into trouble connecting to an Apple XServe running OS X.3.9. It worked fine from another OS X.4 machine, from a Windows XP machine. However, from a newly reloaded Vista Ultimate machine, I could not map the same network drive. I found on Apple's website a fix that modified LAN Manager Authentication settings. Here's the link:
http://discussions.apple.com/thread.jspa?messageID=8540006�
Since I, begrudgingly, manage several Vista machines I setup a Group Policy with the following setting:
Computer Configruation > Windows Settings > Security Settings > Local Policies > Security Options > Network Security: LAN Manager Authentication level. (By default this read "Send NTLMv2 response only.") > Send LM & NTLM -- use NTLMv2 session security if negotiated.
After making the change on the Group Policy side, I forced the Vista machine to grab the update. After the update, I reattempted to map the network drive and it worked just as it does on my Windows XP boxes.
Now to figure out if I opened up any unnecessary holes in our security scheme. Happy computing.
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