There was a failure during installation of the Microsoft Exchange Data Conferencing service. Unable to write to the registry. Error code: {error code}; Message: {message id}

Details
Product: Exchange
Event ID: 4100
Source: MSExchangeT120
Version: 6.0
Component: Conferencing Service
Symbolic Name: MSG_INSTALL_CANT_WRITE_REGISTRY
Message: There was a failure during installation of the Microsoft Exchange Data Conferencing service. Unable to write to the registry. Error code: {error code}; Message: {message id}
   
User Action
Verify that you have adequate write permissions, and then reinstall the Data Conferencing service.

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