Test Active Sync online
It's often useful to test Active Sync/RPC over https (i.e. after updating a certificate, mobile user issues, etc)- and there's a couple of useful tools you can use:
Configuring Outlook Anywhere for Exchange 2007 SP1
Exchange 2007 has rebranded rpc/https which is now called Outlook Anywhere and has even made some slight modification from RTM to Exchange 2007 SP1. + http://msexchangeteam.com/archive/2007/11/08/447484.aspx
Testing Exchange RPC/HTTPS and Active Sync
Here are two ways of testing Exchange ActiveSync and RPC / HTTPS