Your friend can send an email to ATIP dept quoting the temporary tracking number or payment receipt number that was issued to him and include any of the "Proof of Right of Access" documents. Sending an email proactively will not hurt the process even though ATIP has not asked for the info as yet
After submitting your friend will receive an automatic reply; don't be alarmed by the message in it, ATIP is still processing requests. the message will look this...
IRCC currently has reduced operational capacity due to exceptional measures to curb the spread of the novel coronavirus (COVID-19). As a result, there will be significant delays in responding to all requests under the Access to Information Act and the Privacy Act, as well as any emails sent to this email address, during this period.