Either Enterprise Vault OWA Extensions do not work properly, or you want to check that the prerequisite settings on Exchange Server are correctly configured before installing the extensions.
Enterprise Vault OWA Resource Tool (EVORT) allows you to run a series of checks on your Exchange Servers. These checks help to determine if Exchange Server is correctly configured for Enterprise Vault to work with OWA.
EVORT is a standalone reporting tool that works with any version of Enterprise Vault OWA Extensions. You can run EVORT on Exchange Servers before or after you install the extensions.
Note. EVORT is supported on Exchange Server 2003, Exchange Server 2007 and Exchange Server 2010.