This is in reference to a previous post: <http://www.experts-exchange.com/Networking/Email_Groupware/Exchange_Server/Q_21360771.html
Below excerpt from previous post:
"our configuration is as follows. We have a 2003 DC (PDC role) which is also the DNS Server. We have a 2003 Server that runs Exchange 2003 and is also a DC.
The issue is as follows: If the DC/DNS server is taken off line a user can log onto the network and be authenticated by the DC/ Exchange Server, however when I try open Outlook I get the error message "Your Microsoft Exchange Server is Unavailable". Clearly the Exchange server is available as it was the one to authenticate the user log on. The only thing I can think of is that it has something to do with the DNS server not being available. Should the Exchange server be made a DNS server too?"
Subsequent to this post I have made the Exchange DC a DNS server as well - I am however still unable to log into Outlook if the 2003 DC (PDC role) which is also the DNS Server is offline. Any ideas please?