In the unlikely chance your Exchange 2003 or 2007 Server crashes (3rd party cause most likely), how do you re-install it? Hint: you don’t just run the setup.exe application.
ANSWER:
A1) Exchange 2003 – You use the “/DisasterRecovery” and then run the Exchange 2003 installer. This is so the installer software can attempt to pull the necessary Exchange configuration from within Active Directory. A complete step by step can be found here:
http://www.msexchange.org/tutorials/Recovering-Failed-Exchange-2003-Member-Server-Using-Disaster-Recovery-Switch.html
A2) Exchange 2007 – You use the “/RecoverServer” switch.
http://www.msexchange.org/tutorials/Recovering-Exchange-2007-Server-RecoverServer-switch.html