Which account makes modifications?

Which account makes modifications?

We want all changes in AD Manager to be logged as that user, not a generic service account.
 
Example:  UserA logs into Admanager with his Domain credentials.  Upon login, UserA makes a change to Active Directory.  When reviewing logs on the affected Servers, we want the change to have been made by UserA, not a generic domain service account with Domain Admin priveledges.
 
Is this possible?
 
What does the, 'impersonate as admin' option actually do, or not do if unchecked.
 
Thanks,
 
 
Mike