Hi everyone, I've just upgraded my company's computers to Windows 11, and I'm facing a frustrating issue. Although I can log in with domain users without a problem, I can't access the C drive of these machines from other network computers. Every time I try, it prompts me for a domain username and password. I know I'm entering the correct credentials since I just used them to log in as a domain admin. However, I'm getting an error stating that the network password is incorrect. My Windows 10 machines would only ask for credentials if I wasn't logged in as a domain admin, and they accepted the admin credentials without issues. I've tried various registry edits and group policy settings but haven't found a solution. Can anyone offer some advice?
4 Answers
You might be dealing with duplicate SID issues or problems with SMB versioning or signing. Additionally, check whether it's a Kerberos versus NTLM authentication issue. Those can sometimes cause unexpected authentication failures after an upgrade.
Be sure to verify that the domain trust is intact and that the secure channel is functional. Also, check your DNS settings. Try accessing the shared folder using the IP address instead of the hostname to see if that changes anything.
Are you completely sure that these PCs are still connected properly to your domain? If so, try removing one from the domain and then adding it back again to see if that helps resolve the authentication problems.
It sounds like you're doing everything right, but the issue might be related to the Windows Firewall settings. Are you managing firewall rules through group policy or an MDM? If you haven’t touched the firewall settings since upgrading, they might be blocking the necessary permissions. It could be worth checking those settings.
I've removed the machine from the domain and rejoined it. I can ping the device, but it still prompts for credentials, and they aren't being accepted.
Thanks for the tip! I’ll look into DNS and see if that resolves the issue.