After a NetWorker group backup finishes, you see this error in the savegrp completion report:
Probe job had unrecoverable failure(s)

What is the most likely cause?

A.
NetWorker server does not have permission to back up the client

B.
host1.emc.com has an error in its servers file

C.
nsrexecd is not running on the client

D.
A firewall is preventing host1.emc.com from accepting connections from the NetWorker server