On this link
http://www.cic.gc.ca/english/information/offices/canada/ottawa.asp
I need to change my personal information or my mailing address. What do I do?
Please e-mail us (OttPilot-Immigration @ cic.gc.ca) in any of the following cases:
You change your marital status
There is a birth or death in your family.
You change your mailing, residential or e-mail address if you reside outside of Canada**.
**If you reside in Canada, you must use the CIC's online form to change your contact information.
It is up to you to keep your contact information up-to-date. If you do not keep your contact information up-to-date, it could delay the processing of your application. Please quote your complete application number (letter “E”, “EP” or “F” ) followed by eight or nine digits in all correspondence with our office.
I also saw this:
I need to send documents that are part of the application process. Where do I send them?
Scan and e-mail documents (other than police certificates) to: OttPilot-Immigration @ cic.gc.ca
Send original Police Certificates to:
Case Processing Pilot – Ottawa
219 Laurier Avenue West, 7th floor, section B
Ottawa, Ontario K1A 1L1
Canada
**** If you applied at the Canadian Visa Office in Buffalo, New York, we have transferred your application to the Case Processing Pilot-Ottawa (CPP-O) for processing.