I have a large network with 100's of subnets. Currently within AD Sites and Services the Default-First-Site-Name is the only site configured without any subnets added, so in simple terms it is a default out of the box configuration.
A colleague wanted to test site aware group policies, so I configured a site based on his own subnet. My computer is a member of a different subnet on running nltest /dsgetsite from a command prompt I receive
DSGetSiteName failed: Status = 1919 0x77f ERROR_NO_SITENAME
So it looks like once you start specifying subnets in AD Sites and Services you have to add all the other subnets that you have on your network or AD will consider that you only have the subnets you have configured. Am I correct?
thanks.