Lindsay Lohan -- Her Entire Management Team Was Behind Michael Lohan's Intervention

Michael Lohan was NOT ALONE in orchestrating an emergency intervention on Lindsay Friday -- and TMZ has seen emails proving that her ENTIRE team, including her lawyers and her manager ... were 100% on board.

The emails are between Michael, Evan Hainey (LiLo's manager) Dave Feldman (entertainment lawyer) and Shawn Holley (criminal defense lawyer). The emails were sent between Sept. 23rd and Oct. 18th (the day before Michael's intervention).

Michael emailed Evan and Shawn on Sept. 23rd, claiming he had been informed by several people Lindsay was "drinking between a bottle and a bottle and a half of vodka per day" adding, "I have seen the empty bottles and even cocaine in her room at Chateau."

Michael continues, "She is AGAIN, taking pills to keep her up and to sleep (adderall)!! I even know that she is and was drinking during work as far back as Liz and Dick!"

Michael then pleads, "I am asking you to PLEASE PLEASE find a way to get her to LA toward the end of the first week of October or the beginning of the second so we can do an intervention and FINALLY end this madness!"

LiLo's manager Evan responds the same day to Michael and Shawn, "I am hearing the same things." Evan continues, Lindsay will fly back to L.A. Oct 15th -- and they should plan an intervention for that week.

Lindsay's lawyer Shawn responds unequivocally, "Let's do it."

On Oct. 12th Michael and LiLo's entertainment lawyer, Dave, sent multiple emails to each other -- planning a conference call with a well-known interventionist, named Earl Hightower.

Then on Oct. 18th (the day before the intervention) Michael sent an email to Evan ... revealing a plan to confront LiLo at her Bev Hills home.

According to text messages from Oct 19th, which we have also seen, the group decided Michael would confront LiLo FIRST ... and everyone else would show up afterwards.

TMZ broke the story ... the emergency intervention floundered -- Michael showed up to Lindsay's pad, but she turned him away and called the cops ... which put a kabosh on the whole thing.