you mean there isn't a Calendar Plug-In for TWiki yet? The shame, the shame! :)

Instead of Outlook, consider making a [link|http://groups.yahoo.com|"Private Yahoo Group"] and then use their built in Calendar, make a hard to guess password and only give it to employees and tell them not to give it out. Yeah yeah, I know, yahoo s*cks, but whadda you do if you don't want to use Outlook but need a Calendar app?

Another thing that you could do, is write a custom VB or VC++ App to use the Outlook object to use the Calendar part, and then Outlook would not futz with the default email settings. But, ah well, it would be interesting. I think I have more info at that [link|http://twiki.iwethey.org/twiki/bin/view/Main/MicrosoftVBAProgramming|TWikiWord MicrosoftVBAProgramming] if you didn't already delete it. Click on the Slipstick Outlook info, or search for it on the MSDN at Microsoft.

if they won't do an Internet solution, how about an Intranet solution?

Aren't there like PHP based Calendars that can be run under PHP 3.0/4.0 and Apache with MySQL as the database? Just set up a 'Nix box, even a 486 will do, running Red Hat 8.0 with Apache, MySQL, PHP, etc.