Your company has four offices.  
The network contains a single Active Directory domain.  
Each office has domain controller. Each office has an organitational unit （OU） that contains the  user accounts for the users in that office.  
In each office， support technicians perform basic troubleshooting for the users in their respective  office.  
You need to ensure that the support technicians can reset the password for the user accounts in  their respective office only. The solution must prevent the thechnicians from creating user  accounts.  
What shoul you do（）

Your network contains an Active Directory domain named contoso.com. Contoso.com contains a  member server that runs Windows Serever 2008 Standart.  
You need to install an enterprise subordinate certification authority （CA） that support private key  archival. You must achieve this goal by using the minimum amount of administrative effort.
What do you do first（）