Error description:

• When preparing to install or configure K2 for Reporting Services, you receive a 401 error when you try to connect to the Reporting Services web site on the K2 for Reporting Services screen in the Setup Manager.
• You still receive the same 401 error no matter what changes you make to permissions or even use different user accounts.
  

Solution

1. Start a command prompt.
2. Locate and then change to the directory that contains the Adsutil.vbs file. By default, this directory is C:\Inetpub\Adminscripts.
3. Type the following command, and then press ENTER:

   cscript adsutil.vbs set w3svc/NTAuthenticationProviders "NTLM"

4. To verify that the NtAuthenticationProviders metabase property is set to NTLM, type the following command, and then press ENTER:

   cscript adsutil.vbs get w3svc/NTAuthenticationProviders

   
   The following text should be returned:
   
   NTAuthenticationProviders       : (STRING) "NTLM"