An EMC Avamar customer wants to configure VADP to protect virtual machines at an image level.
When attempting to add a vCenter server as an Avamar client, they receive an error. They have
created the account on the vCenter server with proper permissions and verified the username and
password are correct. Certificate Authentication has been disabled.
What is the most likely cause of this error?

A.
Data port 443 is not open between the Avamar server and vCenter system

B.
vCenter server does not have the Avamar agent installed

C.
VADP license has not been installed on the Avamar server

D.
GSAN has not been restarted after the certificate was disabled