You need to implement Office 365 authentication.
What should you do?
A. Create an AD DS domain named proseware.com and join the AD FS servers to the proseware.com domain.
B. Add a DNS CNAME record for www.proseware.com and point it to www.adatum.com.
C. Deploy an AD FS proxy for the proseware.com domain.
D. Add proseware.com as an Office 365 SSO domain and update all user principal names (UPNs) to also use proseware.com.
