Microsoft has brought out a new version of its ActiveSync software for syncing Windows Mobile devices. The version is 4.2 (I think this has been out in Beta form for a while).

I have not tried it yet, but the list of connectvity issues it addresses sounds promising:

Changes in ActiveSync 4.2 help resolve connectivity related issues with Microsoft Outlook, proxies, partnerships, and connectivity.

• Microsoft Outlook Improvements: Resolves issues relating to error code 85010014.
• 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.
• Partnership improvements: Better resolution of multiple devices with the same name syncing with the same desktop.
• Connectivity Improvements: Better handling of VPN clients (resolve unbinding of protocols from our RNDIS adapter). New auto detection of connectivity failure with user diagnostic alerts.

Thanks to Eclet at Aximsite forums for the heads-up on this release.

For full details and a download link, check the MS site:

http://www.microsoft.com/downloads/details.aspx?

FamilyID=7269173a-28bf-4cac-a682-58d3233efb4c&DisplayLang=en

Related posts:

1. ActiveSync 4.5 Released by Microsoft
2. Free Smartphone "Notes" with ActiveSync/DirectPush Support
3. The Reason Wi-Fi Support Was Removed from ActiveSync
4. Windows Mobile Device Center Beta 3 for Vista Released
5. SPB Diary – Version 2.02 Released