If you have chosen wrong authentication method in Sharepoint, you can manually change this.
To see what is set:
cd C:\inetpub\adminscripts cscript adsutil.vbs get w3svc/##/root/NTAuthenticationProviders |
To set Kerberos:
cd C:\inetpub\adminscripts cscript adsutil.vbs set w3svc/##/root/NTAuthenticationProviders "Negotiate,NTLM">iisreset |
To set NTLM:
cd C:\inetpub\adminscripts cscript adsutil.vbs set w3svc/##/root/NTAuthenticationProviders "NTLM" iisreset |
## is the virtual server ID number. The virtual server ID number of the Default Web site in IIS is 1.
More info: http://support.microsoft.com/?id=832769
