do you have the DNS point to each other? or use Netdiag to troubleshoot. this page will bring you to Microsoft troubleshooting AD page.
How to configure active directory
Receiving "Domain not found," "Server not available," or "RPC server is unavailable"
error messages. •. User is unable to log on locally to a domain ....
www.howtonetworking.com/articles/msadhowto.htm
Don't send e-mail or reply to me except you need consulting services. Posting on MS newsgroup will benefit all readers and you may get more help.
Bob Lin, MS-MVP, MCSE & CNE
How to Setup Windows, Network, VPN & Remote Access on
http://www.HowToNetworking.com
Networking, Internet, Routing, VPN Troubleshooting on
http://www.ChicagoTech.net
This posting is provided "AS IS" with no warranties.
We have 2 server in differents domains both aren PDC, both has DNS, but when
we try to use Domain and Trusth we received this error "RPC Server is
available", the relation between both was working by around 6 months but
today doesn't work. Thanks for any help.