Hello Lamis
Case Specific Enquiry can be found specific to Visa Offices, where you can report important changes regarding your application, such as births, deaths, marriages, divorces, adoptions, changes in address, changes in employment, acquisition of a new educational credential, results of an approved language test.
The URL for Abu Dhabi is
https://secure.cic.gc.ca/enquiries-renseignements/case-cas-eng.aspx?mission=abu%20dhabi&_ga=1.123257538.872472400.1400516085
I would consider sending them via mail if it is an option, make sure to attach a copy of your SA and a cover letter.