Publish EV for Outlook Anywhere Users

Hi,

I need a clarification regarding the publication of the enterprise vault site.

Lets say we have a EV Server with a vault site name EVSITE - no domain suffix was added during the configuration.
For interns, EV is available via http://evsite/enterprisevault

We also have a external customer domain contoso.com. The customer now wants EV to be available via RPC over HTTPS, so https://evsite.contoso.com/enterprisevault was published. But, if external users click an element in outlook the site http://evsite/enterprisevault is called. 

Will the RPC over HTTP Connection and Proxy URL Setting in the Desktop Policy change this behaviour?

I would set the connection to "Use proxy" and the url to "https://evsite.contoso.com/enterprisevault" 

So the EV is reachable for interns at http://evsite/enterprisevault and as soon as Outlook is in Outlook Anywhere mode it would contact https://evsite.contoso.com/enterprisevault" - correct?

Regards

vmds