Hello Everyone
Here is my little scenario.
i have a domain named contoso.com
i then installed exchange server 2013 in my environment. cas and mailbox server are on seperate box.
switched of my exchange servers for a week, during that period i changed the netbios name of my domain to toso from contos. although my domain name still remain contoso.com. the only change i made was the netbios name
a week later i switched on my exchange servers. during the same time i created two new servers one cas and the other mailbox
i now have 2 cas server and 2 mailbox server
problem now is that when i log into my ecp on one of my cas server using https://servername/ecp. after inserting my username and password i get http 500 internal error
although with exchange management shell i can connect to all the servers