Good morning jrl, my name is Jialiang Ge (MSFT) and I will help you with
this issue regarding how to integrate Outlook calendar with a web site.

Based on my experience, I write down the following 4 solutions for your
reference.

SOLUTION 1. Outlook Object Model

We can program our web site (ASP.NET) to automate the running Outlook with
Outlook PIA (Primary Interop Assembly), which is Microsoft's interface
between .NET and Outlook Object Model.

If you are new to Outlook automation with .NET, we can start with the
following demos:

http://support.microsoft.com/kb/819398

http://msdn.microsoft.com/en-us/library/bb612741.aspx

The article http://articles.techrepublic.com.com/5100-10878_11-5850937.html 
shows how to create an Outlook appointment.

Outlook Object Model is located at
http://msdn.microsoft.com/en-us/library/ms268893(VS.80).aspx

There are some points that we need to pay special attention to when writing
server-side (e.g. web server) automation code of Office:

http://support.microsoft.com/kb/257757

Let me know if you need more resources of Outlook automation. I have much
experience of developing Office solutions that can be shared with you.

SOLUTION 2. Integrate Outlook Calendar and SharePoint

If SPS is available to you, we can consider integrate SPS with Outlook
Calendar. Once the SPS site is added to your Outlook, you can drag/drop
events from your Outlook calendar, or create new events directly in the
SharePoint calendar. This solution is widely used for shared team calendar
for jobs, consulting, projects, events, resource (e.g. conference room,
projectors) reservation, meeting management, etc.
http://download.microsoft.com/download/3/5/3/353d22ab-89b5-497d-beab-ce84b5e4a94
4/OutlookSharePointIntegration_GS_E.ppt

http://www.outlookexchange.com/Articles/JasonSherry/sherry_c24p1.asp

SOLUTION 3. Use WebDAV to read outlook calendar, then display/insert/update
the appointments on web form.

The article http://office.microsoft.com/en-us/outlook/HA101471191033.aspx 
demonstrates how to publish the calendar on a webdav server.

After then, we can build an ASP.NET site, and query the calendar info:

http://msdn.microsoft.com/en-us/library/aa123570(EXCHG.65).aspx

http://www.codeproject.com/KB/aspnet/teamcalendar.aspx

To demonstrate how to create an appointment, I attach an example C# source
file to this message. You can download it with Outlook Express or Windows
Mail.

SOLUTION 4. Third party solutions:

In the section "Tools" of the page
http://www.slipstick.com/calendar/olpubcal.asp, it lists some popular
solutions to share outlook calendars through internet or intranet. For
example, AgendaX at http://www.amrein.com/apps/page.asp?Q=392.

Have a good day!

Regards,

Jialiang Ge (jialge@online.microsoft.com, remove 'online.')

Microsoft Online Community Support

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