DCS console login authentication with AD

Hi all,

If I config Symantec Data Center Security console login authentication with AD.

And when I add the Directory Server by using the Domain ( not Host ).

There are 4 domain control in the enterprise.

Can we still login authentication with AD successfully if first domain control fail ?

I test it in my lab,There are 2 domain control.

If the first domain control disconnect,we can not ogin authentication with AD successfully.

Thanks a lot.