You have an Exchange organization.All servers in the organization have Exchange Server 2010 Service Pack 1 （SP1） installed. All users have Windows Mobile 6.5 devices that connect to the organization by using Exchange ActiveSync. A user named User1 reports that she lost her device and successfully performed a remote wipe of the device. User1 later reports that she located her device. User1 configures the device to connect to Exchange ActiveSync and discovers that the connection fails. You need to ensure that User1 can connect her device by using Exchange ActiveSync. What should you do？（）

• A、Instruct User1 to perform a hardware reset on the device.
• B、Instruct User1 to use the Exchange Control Panel （ECP） to modify the device list.
• C、Run the Set-ActiveSyncDeviceAccessRule cmdlet from the Exchange Management Shell.
• D、Instruct User1 to change her user account password.