[AtNightWeCode]

Surely there should be a way for an owner of a group to revoke these permissions. I am not familiar with the tech though.

If it is not too much hassle I would create a new group, switch to it and delete the old one. This is just one of many reasons corps add prefixes to their naming conventions in the cloud.

I would not go down the path of contacting the companies. You have to see it from their point of view when it comes to security and legal processes. Just because you know that you have not done anything wrong does not mean anything for how they will proceed. They will start from the objectives. Somebody has access to our stuff.