1w2kad-root (1 tree multiple domains)

This is happening from any client on any of the childomains. do you know
whatis neede to allow the childomain to "at least" see their domain objetcs?

using widnows explorer from a client:
Double-click My Network Places.
Double-click Entire Network, and then click entire contents.
Double-click Directory.-->
Double0click root-domain
0 objetcs listed (no domains no OUs)

everything works if I do the same from the DCs in this childomain.