ActiveSync enables transfer of documents, contact in order and other information between a Microsoft Windows-based PC and an ActiveSync-enabled transferable system. Issues with ActiveSync are cause by hardware or software incompatibilities or restricted network availability. There are a mixture of causes of these restrictions.

Firewalls

• While using a firewall configured to block TCP/IP data run, mobile system might be unable to set up a connection with computer. The connection may be unsteady or lose data while synchronization can cause OS to become nonresponsive. This is generally a issue while using a firewall installed using the out-of-box default configuration and can be prevented by including the processes used by ActiveSync to the firewall's exception list.

Port Restrictions

• ActiveSync uses minimum 6 precise ports to help the synchronization of system and enable the transmission of data. Software that closes or selectively enables access to some ports can avoid ActiveSync from setting up a functional connection. Software and hardware firewalls and several peer-to-peer clients often change port availability status and can be configured to enable data transmission on the ports ActiveSync needs.

USB Hubs

• ActiveSync shows erratic behavior while system is connected to a USB hub or docking station and is considered to be unsuited with these systems. Even when the software appears to work the performance can be conflicting and variable Connecting to the system directly through USB is suggested.

Parental Controls

• Many parental control programs allow network access to particular internet addresses. These programs do not always differentiate among the program initiating the connection and can accidentally interrupt synchronization and data transmission. Some of these problems are solved in recent latest of ActiveSync but are not entirely removed.

Virtual Private Networks

• Virtual private networks enable a PC to remotely access a secure private network. Some parts of VPN clients screen and can affect TCP data flow. As ActiveSync uses the TCP/IP stack for synchronization, the connection between PC and mobile system will be registered as a network connection. This enables the potential for interruptions and conflicts with the VPN client.

Microsoft Outlook

• Some user might find themselves not bale to coordinate data properly between mobile structure and Microsoft Outlook. This is the result of difficult to bring into line a large quantity of items or large star items. Other causes of tie issues with Outlook are operating Outlook in offline mode and allow Outlook script blocking.