Unable to delete emails in OWA Exchange 2010


Environment: Server 2008 R2 SP1 and Single Exchange  2010 SP3 Roll up 10
All users are having issue deleting emails from OWA. When they try to delete it I am getting an error message  they are getting error message
The action you tried to perform couldn't be completed because there's a configuration problem on the server. If the problem continues, contact your helpdesk.
The entire error report is listed below:  Hide Report
The action you tried to perform couldn't be completed because there's a configuration problem on the server. If the problem continues, contact your helpdesk.

and when I check event viewer and found the error message
Outlook Web App couldn't connect Exchange Web Services due to a configuration error. Response code = "null, webException.Status = SendFailure".
I googled around and of people said it is a binding error message.   What do I check in Binding. I compared with Other clients Exchange server who don't have this issue and they are identical.

Can you please help me fix this issue?
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MASEE Solution Guide - Technical Dept HeadCommented:
Do you have a host name configured in IIS under the bindings?
If yes you have to remove it.
Open IIS manager --> Right click "Default web site"--> click "Edit bindings"
It will be like the attached one
Jon DoeCommented:
To fix this issue do the following things.

Go to c:\inetpub\wwwroot
Make a copy of web.config file
Open the original web.config file with notepad.
Search for childonly="false"
change the "false" to "true" and save the file.
Restart the IIS service.
Go to IIS -> Default Web Site -> EWS -> Authentication -> Windows Authentication should be "Enabled"
MASEE Solution Guide - Technical Dept HeadCommented:
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ukitsmeAuthor Commented:
Hi Mas,

Thats exactly what I got. please check the attachment
ukitsmeAuthor Commented:
hi Sunit P Mehta,

I didn't find web.config file in C:\inetpub\wwwroot.

please check the screen shot
ukitsmeAuthor Commented:
ukitsmeAuthor Commented:
hi Mas,

I already made the changes. please check the screen shot
Jon DoeCommented:
Navigate to this directory. You may try Start > Run and paste %windir%\system32\inetsrv\config
ukitsmeAuthor Commented:
Don't have a copy of Web.config over there either.
Jon DoeCommented:
<drive>\Program Files\Microsoft\Exchange Server\<version>\ClientAccess\Owa

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ukitsmeAuthor Commented:
There is no fix for it at this stage
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