Shared Calendars Exchange 2010 for iPhone & iPad

Question

I have spent much time reading posts and articles on setting up Exchange 2010 SP2 so that Users can edit and view shared calendars with their iPad's & iPhones.
However I have hit a stumbling block, too many way's and too much information on configuration.  So I have laid out below the commands I intend to use so we publish *.ics which believe is the best way to share calendars with ios systems though I am having
problems with details in the commands.
If anyone has already done this or can provide some examples as I don't use the com shell that often for exchange.
Step 1:
PRE-REQUISITE: OWA External URL must be set
set-owavirtualdirectory –Identity <CAS> -ExternalURL <externalURLforCAS>
- What is "externalURLforCAS"????
Step 2:
PRE-REQUISITE: Mailbox webproxy must be set
set-exchangeserver –identity “servername” –InternetWebProxy ”webproxy URL”
- What is ”webproxy URL” ????
Step 3:
Admin must enable Internet access to exchange published calendars
set-owavirtualdirectory –Identity <CAS> -CalendarPublishingEnabled$true
Step 4:
Admin must enable sharing policy for Internet Publishing
set-sharingpolicy –Identity <PolicyName> -Domains “Anonymous:<accesslevel>”

Answer 1

Hi,
ActiveSync syncs only the default calendar. We are not able to sync shared calendar in Iphone/Ipad. Your understanding would be appreciated.
Just for your reference, you may take a try with some third party tool:
http://social.technet.microsoft.com/Forums/en-US/exchange2010/thread/2d8345a7-4b1e-4a91-bdc9-a6ebd7f514fb/
http://social.technet.microsoft.com/Forums/en-US/exchange2010/thread/b5e752c1-5475-40b6-a476-880ec7679f22/
http://social.technet.microsoft.com/Forums/en-US/exchangesvrmobilitylegacy/thread/84c6a56f-89d7-4a0d-9eef-d26c53be62cf/
http://answers.microsoft.com/en-us/office/forum/office_2007-outlook/public-calendars-sync-with-iphone/547fbab1-c760-43f6-848b-438591412166
Hope it is helpful.
Fiona Liao
TechNet Community Support