We are on a domain that consists of mostly XP Pro and 2000 Server machines and IT is trying to justify moving to Windows 7 and newer servers. I have a Windows 7 Pro machine and it joined the domain without issue. I can look at the active directory and see all computers and users. I can ping the machine I am trying to map the drive to. There are 60 other users with mapped drives to the machine. I have tried to map the drive by FQDN and by IP. I have tried using the administrator login, for both the workstation and the server as cridentials. I cannot browse to the machine, nor specify the path, nor access the shared drives from the Search bar. I can remote desktop by FQDN from the server to the workstation. I have disabled UAC and the firewall at all levels. I have enabled network discovery and file and printer sharing. The multiple users I have logged in with all have administrative rights on the machine and the domain. I tried mapping a drive to a Unix machine running Samba and it failed as well. My password strenght meets the requirements and I can access the windows 7 machine from the run line of my XP Pro machine by \\workstationname and get the shared directories. I have tried having IPv6 on and off (rebooting between) I made sure the duplex mode is correct and I am writing this question through mstsc on the 7 machine from my XP Pro machine so I know all the networking works. Any ideas would be appreciated.

Hi, May I know the exact error when you failed to access the shared folders or drives? Based on my research, I would like to suggest the following: 1. Disable simple file sharing on the Windows XP computers which cannot be accessed: How to disable simple file sharing and how to set permissions on a shared folder in Windows XP 2. Try the following on the Windows 7 client: 1) Click the Start Button, type "gpedit.msc" (without quotation marks) and click OK. 2) In the "Group Policy" window, double click on "Windows Settings" under "Computer Configuration". 3) Double click on "Security Settings"-> "Local Policies"-> "Security Options" 4) In the right panel, double click on the "Network Security: LAN Manager authentication level", please select "Send LM & NTLM Responses". 5) Click Apply and OK. After the steps above, please reboot the Windows 7 computer and check the issue. If it persists, please feel free to let us know. Thanks. Nicholas Li - MSFT