We have had an issue with users id themselves as executives and request access to financial sheets. Its happened a few times where they have gotten access. The emails are not from our organization they are usually fake gmail accounts or something similar. I want to be able to block these from even accessing these sheets.
Also as an admin for the company I was not able to remove this person I had to get the owner of the sheet to remove them.
Can anyone help with these? I seems like a pretty big security risk and I would assume there is something but I am not finding it