Can't connect Windows 7 Pro to Windows 2000 server Domain.
I've been surfing for an answer a few days now on "How to connect windows 7 to windows 2000 server Domain.> I already added the Computer Name and User on the Server.> I already changed the "Network security: LAN Manager authenticaion level" and "Minimum session security for NTLM SSP based (including secure RPC) Clients and Servers."> I disabled the Firewall on Windows 7.*** I'm just a Beginner on Networking ******The weird thing is, I can see the Computers on the Network and I can Open the Shared Folders on the 2000 server, but when I open the Sub-Folder it hangs (Using Quad-Core, Windows 7 Pro and not part of the Domain). But I have another computer running in Windows 7 Pro with Core 2 Duo processor and can easily open the Folders on the Server with no problem at all. I don't know why is that happening.***I hope you can help me.Thank you.
December 2nd, 2009 2:59am

I've been surfing for an answer a few days now on "How to connect windows 7 to windows 2000 server Domain.> I already added the Computer Name and User on the Server.> I already changed the "Network security: LAN Manager authenticaion level" and "Minimum session security for NTLM SSP based (including secure RPC) Clients and Servers."> I disabled the Firewall on Windows 7.*** I'm just a Beginner on Networking ******The weird thing is, I can see the Computers on the Network and I can Open the Shared Folders on the 2000 server, but when I open the Sub-Folder it hangs (Using Quad-Core, Windows 7 Pro and not part of the Domain). But I have another computer running in Windows 7 Pro with Core 2 Duo processor and can easily open the Folders on the Server with no problem at all. I don't know why is that happening.***I hope you can help me.Thank you. Hi - I am having a problem connecting my windows 7 pro laptop to my Win 2000 domain as well. I am able to log on, access the printer and the internet,but unable to access my fileserver. I am being asked for a username and password??? I tried to change the Network Security: LAN Manager Authentication level but it is greyed out at "Send LVTMv2 response only. Refuse LM & NTLM" -- Why is it greyed out and should it be? If not, how do I change it? Is this option unavailable because of some Computer Group Policy in my domain controller? I to am a beginner on networking . . .Karin
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December 2nd, 2009 6:53am

1. Run regedit.2. Navigate to: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Lsa 3. Create a DWORD value under Lsa LmCompatibilityLevel 4. Set the value to 15. quit regedit5. from Start/Run type gpupdate /force On Windows 2000 Server: go to start, run, type gpedit.msc and click ok.Under computer comfiguration, windows settings, security setting, local policies, security options.Look for LAN Manager Authentication Level. Set it to SEND LM & NTLM - use NTLMv2 session security if negociated.Click OK.Then run these commands :secedit /refreshpolicy user_policysecedit /refreshpolicy machine_policy MCSE, MCSA, MCDST
December 2nd, 2009 8:47am

I've been surfing for an answer a few days now on "How to connect windows 7 to windows 2000 server Domain.> I already added the Computer Name and User on the Server.> I already changed the "Network security: LAN Manager authenticaion level" and "Minimum session security for NTLM SSP based (including secure RPC) Clients and Servers."> I disabled the Firewall on Windows 7.*** I'm just a Beginner on Networking ******The weird thing is, I can see the Computers on the Network and I can Open the Shared Folders on the 2000 server, but when I open the Sub-Folder it hangs (Using Quad-Core, Windows 7 Pro and not part of the Domain). But I have another computer running in Windows 7 Pro with Core 2 Duo processor and can easily open the Folders on the Server with no problem at all. I don't know why is that happening.***I hope you can help me.Thank you. Which credential do you use when accessing the Windows 2000 computer? After you open the Windows 2000 computer from the Windows 7 computer, please go to the Windows 2000 computer, open cmd and enter "net sessions". Please let us know the Username. I just suspect that the user does not have permission to access the subfolders. Additionally please let us know how did you change the NTLM authentication level.Arthur Xie - MSFT
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December 3rd, 2009 10:14am

Hi CDOBBS,I tried the procedures that you gave me, but it didn't work.
December 4th, 2009 2:09am

What do you mean by credentials? If I'm right about credentials, I created a User that has administrative rights. I type Net sessions and the Username is "Administrator". When I type Net sessions I saw two names "Administrator". I have another computer who's name on the Net Session is Administrator and she can access the folder. She as the same credentials as the other one (that can't access the sub-folder). The error when I access the folder "The specified folder is not accessible".I accessed the NTLM Authentication level on Windows 7 Pro by going to Local Policies > Security Rights Options > then changed "Network security: LAN Manager authenticaion level" and "Minimum session security for NTLM SSP based (including secure RPC) Clients and Servers."
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December 4th, 2009 2:24am

Hi All:I just installed Win7 PRO on my laptop and I also am unable to Join my win2K Domain. Has anyone solved this issue? Any help/suggestions would be very much appreciated.=Dave=
December 7th, 2009 12:22am

I know you have add the computer name and user name on the server, but you did not join the computer to the domain. Therefore if you try to access the share on the server, actually it accesses with an account of the server system. If you log on with Administrator in Windows 7, you need to set the password the same as the Administrator's password of the Windows 2000 system. Also you need to change the NTLM authentication level in Windows 7. Network security: LAN Manager authentication level Please change the NTLM authentication level to Send LM & NTLM - use NTLMv2 session security if negotiated. Please refer the following article.Arthur Xie - MSFT
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December 10th, 2009 12:28pm

Hi All:I just installed Win7 PRO on my laptop and I also am unable to Join my win2K Domain. Has anyone solved this issue? Any help/suggestions would be very much appreciated.=Dave= Hi Dave, This is a different issue. In order to aviod confusion, please create a new thread and discuss there.Arthur Xie - MSFT
December 10th, 2009 12:29pm

This solution worked great for me. I was getting the message saying my password or username were invalid when trying to connect to a Windows 2000 server from a Windows 7 Pro PC. Once I modified the registry on the Windows 7 PC and modified the settings on the Windows 2000 Server everything is working great. Thanks for the help, this has been driving me crazy.
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March 31st, 2010 5:56pm

Thank you for your help . I solved my windows 7 join problem Tural Sarikaya Ankara - Turkiye
May 20th, 2010 2:02pm

I know this has already beedn resolved but I wanted to add something hoping this would save somebody some time. I work in a small office that is running a 2K server mainly for file and print reasons and most clients are XP Pro. Since I'm IT and wanted the latest and greatest I had upgraded to Win7 Ultimate (64) and never joined the domain because: 1) I have a personal printer 2) I have another box connected to a separate Dedicated DSL Line running FTP Server that I use for file storage and backup as well. When I first upgraded to Win7 I attempted to attache to the domain and after the a couple failures I really didn't try to troubleshoot the problem because there was really no need other than to play with it. Ok.. so here we are today, I have just upgraded our sales team's laptops and loaded Win7 pro whom need to be attached to the Domain and now I was forced to figured this out.. I will say it wasnt hard and here is what I did. 1) Setup a work location and turned on file and print sharing services on each client systems. 2) Added each Computer names to the users profile on the server. 3)Joined the domain on each laptop and mapped the network drives and printers using my credentials (Server Admin) 4) Rebooted & logged in using the users credentials, tested file and printing. I hope this helps somebody else save time. ~Z
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July 1st, 2010 9:14pm

OMG THANK YOU!!!!!! cdobbs, I almost craped my pants to see your instruction worked on my 3 weeks old problem. my desktop W7 can now share files with my W2000 server. Thank you sir, my hats off to you.
November 5th, 2010 6:49pm

We had a very similar problem until we upgraded the server to SP4.
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November 10th, 2010 9:14pm

I made the changes above on the Windows 2000 Server (SEND LM & NTLM - use NTLMv2 session security), and then tried to access Active directory Users and Computers on the server. It returned an error message saying bad credentials. Before this, I had gone to another PC and successfully logged into a PC as 'admin' (which is a Domain Admin). After the change, I logged out of the server, and I can no longer login as 'admin', and can't login as 'admin' to the PC as well. Is there any way I can get into my server again? There's no more Windows 2000 Server support, and there will be a 2008 R2 box arriving within a week. Users can still login and browse the network. Would changing the LAN Manager Authentication Level cause that account to not be able to login? I was able to login as 'admin' before the change was made. Looks like the IT guy before me set GP to disallow regular users to login to the console locally so I can't even login to the server with a regular user account. Users can login to their PC's, and browse the network, but I'm scared that what they're using is just cached credentials and their account will suffer the same fate as admin. How can I get back into the server and change the LAN Manager Authentication Level back to what it was? There is just one domain controller and it supports around 15 users. Thanks
November 30th, 2010 2:00pm

Thanks Arthur! When trying to map a shared network folder I kept getting an error telling me "The specified network password is incorrect." For some reason Network security: LAN Manager authentication level wasn't set to any option. I was able to map the share after setting it to "Send LM & NTLM - use NT..."
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December 1st, 2010 2:19pm

Ok I don’t know if this is the same problem or not but I can see my windows 2000 server and access it or maybe not. I can’t see the shared folders that are on the server, when I click on the server thru the network it opens up but that’s it….. I don’t get error or anything asking for passwords I just can’t see folders. Now we are in the same workgroup. I did change my network security levels on both server and pc too, is there anything I’m missing?
April 7th, 2011 10:15am

I just want to pipe in because I was having a similar problem. I was setting up a new Windows 7 computer and could not connect to the domain no matter what credentials I tried (and believe me, I was using correct credentials). The failed connections were causing user accounts to get locked. This was frustrating because I'd never had this problem with connecting Windows 7 computers to our domain before (Windows 2000 Server). The solution turned out to be one of those smack-yourself-in-the-head things (boy do I feel stupid). While setting up the new computer, I forgot to change the time, so the new computer's clock was an hour off from all the other computers. Once I corrected the time on the new computer, it was able to connect normally to the server/domain. If anyone else runs into this problem, hopefully this will help, but I still feel terribly stupid. >.<
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June 17th, 2011 12:51pm

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