Raj, I emailed them directly to parisimmigration@international.gc.ca.rajkamalmohanram said:AFAIK, you should report changes or communicate further with the VVO using through CSE.
https://secure.cic.gc.ca/enquiries-renseignements/case-cas-eng.aspx?mission=vienna
Do you think there is a significant difference between contacting them through CSE or emailing them?