MS Exchange 2013Office mailapp Configuration queries

Hi,

Currently we are using Exchange 2007 and EV 10.0.3 and we are migrating the same to Exchange 2013 CU2 and to comply for the same we need to upgrade EV to 10.0.4

However post EV upgradation and for Enabling OWA 2013 using office mail app for Enterprise vault do we need to enable HTTPS and do we need certificate.

To enable Office mail app on exchange organization or on single mailbox we need to provide http://EV_server/EnterpriseVault/OfficeMailAppManifest.aspx in exchange power shell command, is this URL is by default available on the Enterprise vault server 10.0.4 or we need to do some configuration from Enterprise vault side.