Issues with Exchange 2013 iApp on 11.4.1

When I execute the following curl command I receive the below answer. To me the answer looks good as it contains a "200 OK" as expected by the monitor (see picture below). Why does the monitor not become green?

    [admjk@F5BIGIP03:Active:Standalone] tmp  curl -k  https://172.17.27.192 -d "/Microsoft-Server-Activesync/healthcheck.htm HTTP/1.1\r\nHost: exchange.domain.de\r\nConnection: Close\r\n\r\n" -verbose
* About to connect() to 172.17.27.192 port 443 (0)
*   Trying 172.17.27.192... connected
* Connected to 172.17.27.192 (172.17.27.192) port 443 (0)
* successfully set certificate verify locations:
*   CAfile: /etc/pki/tls/certs/ca-bundle.crt
  CApath: none
* SSLv3, TLS handshake, Client hello (1):
* SSLv3, TLS handshake, Server hello (2):
* SSLv3, TLS handshake, CERT (11):
* SSLv3, TLS handshake, Server finished (14):
* SSLv3, TLS handshake, Client key exchange (16):
* SSLv3, TLS change cipher, Client hello (1):
* SSLv3, TLS handshake, Finished (20):
* SSLv3, TLS change cipher, Client hello (1):
* SSLv3, TLS handshake, Finished (20):
* SSL connection using AES256-SHA
* Server certificate:
*        subject: C=DE; CN=exchange.domain.de
*        start date: 2014-05-09 12:43:00 GMT
*        expire date: 2016-05-08 12:43:00 GMT
*        common name: exchange.domain.de (does not match '172.17.27.192')
*        SSL certificate verify result: unable to get local issuer certificate (20), continuing anyway.
> POST / HTTP/1.1
> User-Agent: curl/7.19.7 (x86_64-redhat-linux-gnu) libcurl/7.19.7 OpenSSL/0.9.8y zlib/1.2.3 libidn/0.6.5
> Host: 172.17.27.192
> Accept: */*
> Referer: rbose
> Content-Length: 107
> Content-Type: application/x-www-form-urlencoded
>
< HTTP/1.1 200 OK
< Content-Type: text/html; charset=utf-8
< Server: Microsoft-IIS/8.5
< X-Powered-By: ASP.NET
< Date: Fri, 23 May 2014 14:16:14 GMT
< Content-Length: 150
<
* Connection 0 to host 172.17.27.192 left intact
* Closing connection 0
* SSLv3, TLS alert, Client hello (1):