I had this error "Domain is not accessible" for a while when tyring to
browse the domain. And could not find an answer. But I have found out
by doing my own trouble shooting and realized this is mainly a DNS
error. So check out your DNS but i'll tell you the first thing you
wanna check or if you have 2 NIC's in any server thats is a domain
controller because if you do that is causing the issue. Please reply
if this helped anyone.