Synchronization between email, contact management, scheduling (ECS) and customer relationship management (CRM) applications is facilitated through a synchronization module on the ECS side using an Extensible Markup Language (XML) file for keeping track of synchronization states. The CRM server version of an item is compared with the XML file to detect changes and the same performed for the ECS item. The changes are then pushed to the corresponding item for the columns that have changed. Last updated item is selected in case of a conflict.