noticed that ADMINISTRATOR(Built-in account) is a member of many groups:
1.Administrators
2.Domain Admins
3.Domain Users
4.Exchange Domain Servers
5.Exchange Services
6.Group Policy Creator Owners
7.Protected Users
8.RASAdmins
9.SqlDtsUsers
10.SYSTEM-VAX
Is it required? have to ? Or is there something unnecessary? Is there a recommendation in which groups he will be a member?

