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Data Flow in Groupware Integration 
Data such as business partners and activities can be exchanged between SAP CRM and the Groupware solution in both directions. The business partners and activities are provided to Groupware users as contacts and tasks or appointments and vice versa.
The following diagram illustrates the data flow in Groupware integration: -

On the CRM server, the Groupware Adapter manages incoming and outgoing messages.The MapBox framework performs the required transformations and enrichments or reductions of data.
The format of the messages exchanged between the servers is based on the vCard and iCalendar standards.
A server-specific SAP Groupware Connector acts as a bridge between the Groupware Adapter and the Groupware Server. It provides the mapping of the standard exchange formats to the proprietary Groupware Server formats and vice versa.