"Web Server Internal IP Address/Internal Network Name Disclosure Vulnerability" + IIS 8.5 = URL Rewrite Breaks ECP

Hi,

I had to run a PCI scan on our Exchange 2013 on Win12 SVR R2. I get a failed result with:

Web Server Internal IP Address/Internal Network Name Disclosure Vulnerability

GET / HTTP/1.0



HTTP/1.1 301 Moved Permanently
Cache-Control: no-cache
Pragma: no-cache
Location: https://***.***.***.***/owa/
Server: 
Date: Thu, 31 May 2018 18:11:45 GMT
Connection: close
Content-Length: 0

When i use the URLrewrite extension for the IIS, i would not have access to the ECP.

<rewrite>
            <outboundRules>
                <remove name="Obfuscate Internal IP" />
                <remove name="Server response" />
                <rule name="Server response" enabled="true">
                    <match serverVariable="RESPONSE_SERVER" pattern=".*" />
                    <conditions />
                    <action type="Rewrite" />
                </rule>
                <rule name="Obfuscate Internal IP" enabled="true" patternSyntax="ECMAScript">
                    <match serverVariable="RESPONSE_LOCATION" pattern=".*" />
                    <conditions />
                    <action type="Rewrite" value="exchange.sessomslaw.com" replace="true" />
                </rule>
            </outboundRules>
        </rewrite>

Help please