Some BIS settings are set from the server environment. To set a BIS environment variable: 
            
            
               
               - Log in as Administrator, or an account that is a member of the Administrators group. 
               
- Click Start > Control Panel > System. 
               
-  Click the Advanced tab. 
               
- Click the Environment Variables button. 
               
- Under System Variables, click the New button. Alternatively, if the environment variable has already been set, click the variable name in the list box and then
                  click the Edit button. 
               
- Enter the variable name and the value and select OK. 
               
- When done, click OK to dismiss the dialog box. 
               
                
               
            
            
             The changes take effect immediately.