In an organization with Exchange Server 2010 exists Edge Transport Server named Server
1. A partner organization has Exchange Server 2010 Edge Transport Server named Server
2.
You need to encrypt SMTP communication between Server 1 and Server 2. The solution
must ensure that both servers use a trusted certificate. What should you do?

A.
Enable Domain Security Authorization

B.
Enable Exchange Server Authorization

C.
Enable Externally Secured Authorization

D.
Disable anonymous users permission group