Lakers co-owner and governor Jeanie Buss called the meeting, which was led by president of basketball operations Magic Johnson.
Sources said Johnson and Lakers general manager Rob Pelinka spoke to a large group of team employees, warning them about tampering.
Other employees received written notices on the matter that referenced possible termination as punishment for anyone who does not adhere to NBA rules.
The Lakers have been punished twice by the NBA for tampering in the past year, and as one team source put it, "We are under incredible scrutiny with everything, so Jeanie and [Johnson] had to make this crystal, crystal clear to everyone."
NBA rules prohibit teams from negotiating with free agents until midnight on July 1.
Jalen: Lakers must 'slow it down' with tampering, side shows
Jalen Rose likes Los Angeles upper management having a meeting to assure there is nothing getting in the way of acquiring superstars.