Aouar admits Lacazette is in regular contact.
He told Goal: "He wrote to me a lot. He explained to me that all the great players have gone through difficult times in their careers.
"As soon as I joined the squad, Alex took me under his wing. We did not cut the contact after his departure and he was there at times when it was a little more difficult to cheer me up and motivate me for the future."
Lacazette left OL last summer for Arsenal.