Syncronizing User A's Calendar to User B, C, D etc. Calendar using Outlook or Exchange

We have a "company calendar" actually a user named Company on our Exchange Server.  It is setup as a shared Calendar so everyone can open it under Outlook via Open a Shared calendar.  This works great.  People update the calendar and all can see.  The problem is we now have multiple users who have PPC Phones with EVDO so they are hardly ever in their office or on their laptops looking at the Outlook shared calendar.  When someone updates the "Company users" calendar it updates but does not send the request to "Push" it to their phones and even on a manual sync does not because the PPC Phones only get updated with info from the users calendar.  Does anyone know a way to have the User "Company" syncronize all changes to users say "B, C, and D"  This way the client software will update the PPC's and then people will also not have to open the "Shared" calendar since we primarily use the calendar anyway, no one puts personal stuff on their own calendar, we ONLY use the Shared.  Thank you.