SharePoint SiteMialbox failed with 503 error (AutoDiscover.svc web service call failed)

I followed Technet articles to configure SiteMailBoxes in our environment & exchange sever.

When we created Sitemailbox in a SiteCollection &when we try to open it, it failed with below error.

Site Mailbox
We are having trouble connecting to Exchange Server
The server might be temporarily unavailable. Please check back on this page in a few minutes. If this problem persists, please contact your system administrator.
Correlation ID: bb0fe99c-6f4e-e084-b191-881fbf0fa977, Error Code 10 

ULS Log (503 error)

Autodiscover Diagnostics Response Headers: request-id: 95d12ceb-283e-4495-b28b-256503fd097c  client-request-id: 742fe69c-ef5a-e084-ca05-6098c759c584  X-CalculatedBETarget: devapwxyz01a.devap.mydomain.com  X-FEServer: DEVNAABCD01B  Content-Length: 0  Cache-Control: private  Date: Tue, 03 Feb 2015 18:53:40 GMT  Set-Cookie: X-BackEndCookie=; expires=Sun, 03-Feb-1985 18:53:40 GMT; path=/autodiscover; secure; HttpOnly  Server: Microsoft-IIS/8.5  X-AspNet-Version: 4.0.30319  X-Powered-By: ASP.NET     742fe69c-ef5a-e084-ca05-6098c759c584

if I am correct, X-CalculatedBETarget supposed to be DEVNAABCD01B.devna.mydomain.com but it connected to different domain devapwxyz01a.devap.mydomain.com.  Do you guys have any idea on this?  (I verified the same using fiddler, it is failing right at autodiscover.svc call.)

I wrote a powershell script to connect autodiscover service in sharepoint server & this web service call able connect right server X-CalculatedBETarget. It gave the expected response.

I am not sure why SharePoint webservice call (X-CalculatedBETarget) is going to different server?

let me know if you guys have any ideas.

Thanks.

• Edited by PPReddy19 Friday, February 13, 2015 4:44 AM

I hope that these articles would help you to configure site mailbox, please select as mark as answer

http://searchexchange.techtarget.com/tip/How-to-configure-Exchange-2013-site-mailboxes

https://technet.microsoft.com/en-us/library/jj552524.aspx

http://www.scinaptic.com/support/0109.html

• Proposed as answer by Rajkumar Nagaraj Monday, February 16, 2015 2:59 PM
• Unproposed as answer by PPReddy19 16 hours 25 minutes ago

Thanks for the Response Raj.

I already followed the same instructions in the Links.

When SharePoint Autodisover.svc webservice send a request to Exchange server & Exchange server redirecting that request to different server, this is the problem i am facing right now.

X-CalculatedBETarget supposed to be DEVNAABCD01B.devna.mydomain.com but it connected to different domain devapwxyz01a.devap.mydomain.com.

Let me know if you have any suggestions?