Access problems

[candidpurge]

I hope this doesn't bother you. Maybe, I'll be needing some of help for those who have experience with access matters. Anyway, we are encountering problems with uncontrolled access to administrator accounts and users. We need to find ways to prevent damage on our systems. What is the best possible solution to this?

[Changebox]

A least privilege solution could help because its goal is to limit assigned administration rights and privileges and can improve security.