EV OWA : Items can't be opened from external

Hello,

We just enabled OWA from external connections.

Everything is working fine with OWA from internal connections (Icons, contextual menus, items retrieve, etc).

But from "outside", archived items can not be opened. And icons are not showing.

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Configuration:

EV version : 10.0.4 (one server)

EV server OS : Windows Server 2008 R2

Exchange version : 2010

Exchange server OS : Windows Server 2012

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I followed all the troubleshooting docs I could find but I can't find what is missing.

We use Exchange as a proxy, so I added EnterpriseVault_ExternalIPAddresses value for our reverse proxy IP into web.config file

When I run EVORT (v2.0.0.1023), I have this error :

Test module: CheckVirtualDirectories => Failed Test failed to complete

Status : Failed

Fail reason : Invalid query

Any help much appreciated.

Thank you to all of you.