For some reason, I had not yet tried an AFP connection to an OS X server share from Windows 7 yet. So, I tried it today. Opened Computer, clicked on Map network drive and proceeded to map the drive. After providing the correct credentials, Windows 7 would not connect.
What do I do next? Search for an answer online (okay, I googled it). It took me a couple tries, but I finally found the following answer. Go to Administrative Tools > Local Security Policy > Local Policies - Security Options. Find the policy that's called:
Network security: LAN Manager authentication level
Then modify the setting to show Send LM & NTLM responses. Next, in the same location, find the policy that's called:
Network security: Minimum session security for NTLM SSP
Then modify the setting to disable Require 128-bit encryption. In my attempt, I only modified the first setting and was able to get in. The second setting was listed in the answer I found here:
http://www.tomshardware.com/forum/75-63-windows-samba-issue
Basically, regardless of the type of connection (i.e. Samba, AFP, etc.) Windows needs to be able to send the correct type of challenge/response authentication protocol. By default, Windows 7 is not allowed to send the right one/type to OS X. This change in the local policies worked for me.
Happy Computing.
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