we have three sites and connected together via VPN IPsec Site-to-Site full mesh, now we install a new exchange and domain controller in every site.
we have an issue between site 1 and site 3 but we dont have any issue between site 1 and 2, 2 and 3.
i opened all the ports any any, and we can not solve it.
please find the configuration files of each site. the name of the file describes the site number. Thanks.