Microsoft ActiveSync 4.5 is the latest sync software release for Windows Mobile-powered devices. ActiveSync acts as the gateway between your Windows-powered PC and Windows Mobile-powered device, enabling the transfer of Outlook information, Office documents, pictures, music, videos and applications to and from your device.

Changes in ActiveSync 4.5 Beta 2 help resolve issues related to setup, partnerships, and connectivity with the PC and Microsoft Exchange. In addition, it includes a troubleshooter utility that scans your computer and device to identify problems and offers information and corrective actions to solve them. ActiveSync 4.5 Beta 2 supports PC sync via USB cable, Bluetooth, or infrared connection.

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• Faster file transfer speed and photo sync via Outlook are only available for Windows Mobile 5.0 powered devices. 
• Remote PC Sync (via WiFi or LAN) has been removed due to Enterprise customer feedback around security issues. 
• Customers using Microsoft Exchange 2003 Service Pack 2 with devices running the Messaging and Security Feature Pack for Windows Mobile 5.0 will benefit from the following feature enhancements included in ActiveSync 4.5: Direct Push Technology, local device wipe, and certificate powered authentication to Microsoft Exchange.
• Microsoft® Outlook® 2000 is not supported by ActiveSync 4.5 Beta 2. It is highly recommended that users upgrade to Microsoft® Outlook® 2003 messaging and collaboration client.
• Conversion of database files for use on a mobile device is not supported by ActiveSync 4.5 Beta 2. On previous versions, this feature was limited to devices running Windows Mobile software for Pocket PC 2003 and earlier.
• Conversion of font files for use on a mobile device is not supported by ActiveSync 4.5 Beta 2. On previous versions, this feature was limited to devices running Windows Mobile software for Pocket PC 2003 and earlier.