I absolutely believe it was John Kerry that told Russian Amb. Kislyac to contact Gen. Flynn.
Then Kerry told Samantha Powers to check to see if he made contact.
https://2009-2017.state.gov/secretary/travel/2016/t32/index.htm
John Kerry meets with Russian Foreign Minister Sergey Lavrov 11-17/16 in Peru
John Kerry meets with Russian Foreign Minister Sergey Lavrov 12-2-16 in DC
Day after Flynn call with Kislyac