@Spyridon thank you : The full string if like this, right ?
mongodb://user:password@cluster0-shard-00-00.xxxxx.mongodb.net:27017,cluster0-shard-00-01.xxxxx.mongodb.net:27017,cluster0-xxxxx-00-02.czlaa.mongodb.net:27017/database?ssl=true&replicaSet=atlas-aaaaa-shard-0&authSource=admin&retryWrites=true&w=majority
It can be displayed using nodejs 2.12 (!!!) in atlas connect procedure.
No improvement with this string … is it the same for you ?
we are trying VPC peering now.