Hello to everyone. I have a simple question but it's very hard for me to find the answer, I have 2 organizations in the 2 forests: One forest called WEST.LOCAL and the Second forest called CENTER.LOCAL, and of course there is a 2 exchange servers in those forests. There is a R70 firewall between two forests, the 3rd leg of R70 goes to DMZ where the EDGE server is, after the EDGE there is a router+modem to the internet. my question is: How can i configure exactly the two forests and the two exchange servers that i could send and receive emails between two forests??? and how can i send receive emails to and from the internet??? 10x.eternals81

First of all i want to thank you for giving me a good answer, i learned a lot from it. I did every thing you have linked me except the cross-forest connector between Exchange 2010 servers using external authentication because i have one exchange 2007 and one exchange 2010. Second, the email could not arrived to another forest, when i opened a queue viewer it giving me this error on the second row is West.local(next hop domain)-SmartHostConnectorDelivery(Delivery Type),the first row is the submission(next hop domain) witch is undefined(Delivery Type): "451 4.4.0 Primary Target IP address responded with 454 4.7.5 Certificate Validation Failure....Attempted failover to alternative host but that did not succeed. Either there are no alternative hosts or delivery failed to all alternative hosts". If you have any idea how to solve it please let me know. love you all.eternals81

And what about other tabs of the hub transport in the organization configuration (accepted domain, email address policies, transport rules, Edge subscription, journal rules, remote domains,global settings), how should i configure them??? And what about the other tabs of the Edge Transport(accepted domain,transport rules, anti spams), how should i configure them??? 10x again to everyone. love you all.eternals81

Yesssss, thanks it is working now but i can only check between two forests. for your question: no, i did not even tried to send or receive email to from the internet because i guess i should pay the DNS services in my provider, am i right??? How to set up my SSL certs for my both forests??? how do i do it?? thanks again, you are the greatest people!!!eternals81

What do you mean purchasing DNS names? How to publish DNS records for my mail servers?eternals81

Do you have an example or link how to do it??eternals81

hi, Any update? Please remember to mark as answer. thanks,CastinLu TechNet Community Support