managed to resolve this
updated webconfig to
EnterpriseVault_EnableExtensionsInOwaAuthClient set to TRUE - default if the setting is not there is false
also my cert only had the external name so i had to also set
EnterpriseVault_ExchangeWebServicesUrl https://FQDNofCAS/ews/exchange.asmx
The values 'FQDNofCAS' should be one of the values that is configured within the SSL Certificate
Question on something similar. Does EV9 and OWA 2010 support client connections proxied through CAS 2010
the documentation mentions
"In an Exchange Server 2007 or later environment, OWA clients always attempt to contact the Enterprise Vault server directly for Archive Explorer and archive search requests, irrespective of the value of this setting. By default, Outlook Anywhere clients always attempt to contact the Enterprise Vault server directly for all Enterprise Vault requests.
In an Exchange Server 2007 or later environment, Use proxy has the following effect:
OWA clients continue to contact the Enterprise Vault server directly for Archive Explorer and archive search requests, irrespective of the value of the setting.
Outlook Anywhere clients first attempt to connect to the default Enterprise Vault Web server. If the URL cannot be contacted, then the clients attempt to contact an Enterprise Vault proxy server using the RPC over HTTP proxy URL configured in the advanced Outlook settings in the desktop policy. The Enterprise Vault proxy server routes the requests to the Enterprise Vault server that hosts the archive.
Supported values
Use proxy (default)
Direct
Legacy name
OWAClientUseDirectConnection"
how abt owa 2010 /cas 2010/ev9.01?
i've got an f5 firewall and load balancer ..do i need to configure anything special to get ev to work with cas in this environment.