DDM's questions

I understand Exchange 2010 with SP1 has the ability to publish calendars as .ics URLs - can it do that for shared calendars (i.e. group calendars, not personal calendars) and can it have multiple calendars in this form?

I'm looking for a solution that will provide a client with the ability to publish multiple event calendars and have those calendars viewable by lots of different client types both individually and with an aggregate view.

Calendars need to be viewable natively in various versions of Outlook (2003, 2007, 2010), Apple MacOSX iCal, on iPhone/iPad/Android/other smart phone, within a Sharepoint portal (could be a custom webpart). Viewing is anonymous.

Updates could be via Outlook or a HTML interface (i.e. OWA).

The client currently has Exchange 2007 and is considering an upgrade to Exchange 2010 - are either of these capable of presenting readonly views of multiple shared calendars to non-MS clients? Are they capable if presenting aggregate views of shared calendars?

Are there better solutions?

I know how to canonicalise the case of URLs on incoming request to IIS7.5, in fact, there's a built in rule template to start from. But how about outbound (without changing the code)?

This is where I got to so far:

    <outboundRules>
        <rule name="Outbound lowercase" preCondition="IsHTML" enabled="true">
            <match filterByTags="A" pattern="[A-Z]" ignoreCase="false" />
            <action type="Rewrite" value="{ToLower:{R:0}}" />
        </rule>
        <preConditions>
            <preCondition name="IsHTML">
                <add input="{RESPONSE_CONTENT_TYPE}" pattern="^text/html" />
            </preCondition>
        </preConditions>
    </outboundRules>

However, IIS barfs on the action with a 500 implying an invalid web.config, probably on the {ToLower:XXXX} which I stole from the MS-supplied inbound rule template.

Anyone know how to do this?

Anyone know where the options are fully documented (my GoogleNinja skills failed me: I found this but "Specifies value syntax for the rule. This element is available only for the Rewrite action type" is not really comprehensive).

Thanks, Damian