Exchange 2013 // Error 500 when login OWA through ARR2.5 or other reverse proxy solution

Question

We install a new Exchange 2013 server with CU2 in our Exchange organization with a single Exchange 2007 server. We use a reverse proxy solution for publishing Outlook WebApp and sync. Internal Outlook WebApp works fine, but when we login from internet,
we get the error:
":-( Something went wrong"
In the address bar, we see the following URL:
https://webmail.company.com/owa/auth/errorfe.aspx?httpCode=500
When we try to login on https://webmail.company.com/ecp, it works fine. But OWA fails.
Login on legacy mailboxes works fine. When we login on the new Outlook WebApp URL, we automatically forwarded to the legacy URL.
We try the following reverse proxy solutions:
Citrix Secure Gateway 3.3 on a Windows 2008 server
ISS ARR on a Windows 2012 server (http://blogs.technet.com/b/exchange/archive/2013/07/19/reverse-proxy-for-exchange-server-2013-using-iis-arr-part-1.aspx)
Is there anyone that knows how I can troubleshoot this problem?

Answer 1

Hi
Mostly looks like this is host (A) issue.You can check the below things
Just check of the mail host (A) record is created on internal DNS server and ensure its pointed to new Exchange 2013 server.
If the mail host (A) record is pointing to old exchange 2007 server just modify it and make it to point to new Exchange 2013 server
Check the DWS directory in edit binding if loopback 127.0.0.1 is added if not add them
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Regards,
Sathish