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EH&S Management Server 
The EH&S management server is installed as a Microsoft Windows service and manages the generation servers for the Windows Wordprocessor Integration (WWI) program and the EH&S Expert servers for the SAP EH&S component by Remote Function Call (RFC) from the SAP system.
Using the EH&S management server you create the WWI generation servers and EH&S Expert servers as Microsoft Windows services.
Alternatively you can set up WWI generation servers and EH&S Expert servers manually as console programs in Customizing for Basic Data and Tools. In contrast to console programs, Microsoft Windows services can last longer than the duration of a session. This means the service can be executed without a user having to be logged on to the PC. A service can, for example, be started automatically at system startup and be run in the background for the user.
Only one EH&S management server can be installed on a server PC, but this server can log itself on to a number of SAP systems. The EH&S management server has the following architecture:
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1. There is one Remote Function Call (RFC) server per SAP system, which technically is a thread and which handles communication with the SAP component EH&S.
2. Synchronization of the EH&S management server allows it to log on to several SAP systems.
3. The EH&S management server monitors existing WWI generation servers and EH&S Expert servers and restarts them if errors occur. The Service Control Manager (SCM) serves as the central technical communication instance between two services or between a service and a service administration program.
4. Within EH&S service administration, the EH&S management server has the following functions:
¡ Installation and deinstallation of services
¡ Control of services (starting, stopping, restarting)
¡ Display and change of service configurations (SAPRFC.INI, WWI.INI, EH&S Expert parameters and EH&S Expert sets of rules)
5. File transfer
¡ File transfer from server PC to front-end PC
¡ File transfer from front-end PC to server PC
Architecture of EH&S Management Server
