ActiveSync 4.5 Beta 2 增强了 Smartphone 同PC和 Microsoft Exchange 间的安装、协作以及连接能力. 此外, 这个版本还包括有一个诊断工具, 可以扫描电脑和设备, 并提供相关的解决方案. ActiveSync 4.5 Beta 2 支持 Smartphone 到桌面或 Tablet PC 的USB、蓝牙和红外连接.
Faster file transfer speed and photo sync via Microsoft Outlook is now available for Windows Mobile 5.0 powered devices. 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 Office Outlook 2000 is not supported by ActiveSync 4.5 Beta 2. If a customer wishes to take full advantage of ActiveSync 4.5 Beta 2, then it is recommended that users upgrade to Microsoft Outlook 2003. 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. 
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