Peter J Murray wrote:
> Hello
>
> We are running into an issue where people want a collaborative 
> calendar system and I know that Exchange fits the bill perfectly.  Can 
> you run exchange and only use the calendering part of it?  Can you 
> send meeting requests and all that or does that require you to use the 
> mail component as well?
>
> Also, is there something else that's even close that might work this way?
>
We use the Sun calendar at ACNS:

http://www.sun.com/software/products/calendar_srvr/index.xml

./matt