Hi all had to rebuild on server 2008 box, depending on the roles you are installing the follow components need to be installed. You can simply add them into a batch file.

 

# pre requisites for installing exchange 2007 on server 2008

#run in seperate script
#ServerManagerCmd -i PowerShell

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# For CAS Server
ServerManagerCmd -i PowerShell

ServerManagerCmd -i Web-Server
ServerManagerCmd -i Web-ISAPI-Ext
ServerManagerCmd -i Web-Metabase
ServerManagerCmd -i Web-Lgcy-Mgmt-Console
ServerManagerCmd -i Web-Basic-Auth
ServerManagerCmd -i Web-Digest-Auth
ServerManagerCmd -i Web-Windows-Auth
ServerManagerCmd -i Web-Dyn-Compression
ServerManagerCmd -i RPC-over-HTTP-proxy

###############
#For Edge Transport

#ServerManagerCmd -i ADLDS

##########################
#For Hub Transport
ServerManagerCmd -i PowerShell

#####################
#For Mailbox Server

ServerManagerCmd -i PowerShell

ServerManagerCmd -i Web-Server
ServerManagerCmd -i Web-ISAPI-Ext
ServerManagerCmd -i Web-Metabase
ServerManagerCmd -i Web-Lgcy-Mgmt-Console
ServerManagerCmd -i Web-Basic-Auth
ServerManagerCmd -i Web-Windows-Auth

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