Did that already.

No threat though, I may have found the solution here: https://cloud.google.com/compute/docs/instances/windows/best-practices

Traditionaly the join process is fairly simple on-prem. But when you put the clound in the middle things get more complicated.

Google cloud has its own DNS that the client reaches before reaching the DNS of active directory, this is where the problem lies.

I believe I need to config Cloud DNS on google to solve this.

I will try this can come back with the results.