On the web server:
In IIS 5 or 6 
Open IIS
  1. Right-click the virtual directory and select Properties
  2. Select the Directory Security tab
  3. Click Edit under Anonymous access and authentication control
  4. Check the box for Integrated Windows authentication
  5. Uncheck all other boxes
  6. Click OK
In IIS 7
  1. Open IIS Manager and navigate to the level you want to manage (bbappfx)
  2. In Features View, double-click Authentication.
  3. On the Authentication page, select Windows Authentication.
  4. In the Actions pane, click Enable to use Windows authentication.