Scenario: A Citrix Engineer has configured external access to Citrix StoreFront through NetScaler and a
corresponding store on the StoreFront servers with user validation on NetScaler. When testing the external
access, the engineer is able to log on, but receives this error message:
Access is denied due to invalid credentials.
The engineer validates that root SSL certificates are in place both on NetScaler and the StoreFront server.
Which configuration step should the engineer take to solve this issue?

A.
Configure STA server entries on the NetScaler virtual server.

B.
Upgrade firmware on the NetScaler to at least version 10 build 69.4.

C.
Enable the ‘Request tickets from two STAs’ option when creating the store.

D.
Add the NetScaler VIP and external access URL to the hosts file on the StoreFront servers.