We performed a full Wireshark trace when the authentication failure happens.
It looks like all successful authentications send packets to the domain controller and perform an LDAP searchRequest. However, when the failures happen, we don't see any data being sent to the Windows domain controllers. Possibly a cache related issue? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/526464 Title: intermittent authentication: check_ntlm_password: Authentication for user [someuser] -> [someuser] FAILED with error NT_STATUS_ACCESS_DENIED -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs