Hi, I had a problem in my exchange 5.5 a few days ago: our DNS was stopped and we renewed the domain (with same settings of DNS number and MX).. After the reconnection, some of the computers in my network are not able to access the domain or exchange server. I use NT 4 in mixed environment. My network has local IPs and real IPs. The computers with local IPs only has this problem.. Any Idea?? regards Saleh