Connect to ActiveSync using Bluetooth
Microsoft ActiveSync Help  

Connect to ActiveSync using Bluetooth

Use a Bluetooth connection to quickly create a direct connection between your mobile device and desktop computer. This method can be an advantage when switching between multiple devices because there are no cables or adapters to change.

Important Note   For additional security, disable network bridging on the PC (specifically, bridging to a Remote NDIS adapter) before connecting to the PC to pass though to the Internet or a network. For more information on network bridging, see Windows Help on the PC.

To use a Bluetooth connection, do the following: