A number of you have contacted me with regards to what's new in Activesync 4.2 - well here are the key elements: (remember to link to this posting rather than just copy/paste the content) (you know who you are ;) )
Microsoft Outlook Improvements
Resolves issues relating to error code 85010014
Improved Synchronization between Lunar Calendar appointments and Windows Mobile 2003 devices.
Proxy/DTPT interaction Improvements
Improved auto configuration of device Connection Manager settings when desktop has no proxy path to the internet.
Improved Desktop Pass Thru behavior with ISA proxy failures
Better resolution of multiple devices with the same name syncing with the same desktop
Better handling of VPN clients (resolve unbinding of protocols from our RNDIS adapter)
New auto detection of connectivity failure with user diagnostic alerts