There is a way to include a screen name and password in a hyperlink to your calendar. You could place such a link on a page that is only accessible inside your intranet. When a user clicks on this link it would open the calendar and log him or her in automatically.
The structure of the link would be:
http://www.calendarwiz.com/calendars/calendar.php?crd=calendaridentifier&psw=userpass&scr=userscreen
Where calendaridentifier is the identifier for your calendar and userscreen and userpass are the screen name and passwords you set up for the user. This link will open in month view; you can substitute week.php, day.php, and list.php for calendar.php to open in other views. Be careful to set the viewing and editing privileges appropriately for the userscreen and userpass you choose.
Note: to remove the “logout” button on a calendar with automatic login, make the following change to your url.
Insert the text: nolog=1& as demonstrated below.
http://www.calendarwiz.com/calendars/calendar.php?nolog=1&crd=calendaridentifier&psw=userpass&scr=userscreen