https://www.adamcouch.co.uk/protected-users-group-in-active-directory
https://www.rebeladmin.com/2019/07/step-step-guide-active-directory-protected-users-security-group
https://static.carahsoft.com/concrete/files/9416/6154/4033/AD_Security_Training_Master.pdf
https://www.rebeladmin.com/2016/02/active-directory-protected-users-security-group
https://activedirectorypro.com/active-directory-security-best-practices