A web browsing error occurred when opening OWA Calendar

We are running Exchange 2010. Whenever we open open OWA Calendar, we receive this message: A web browsing error occurred. Every one has this problem. Here are the details of the error:

Client Information

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User Agent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; WOW64; Trident/4.0; SLCC2; .NET CLR 2.0.50727; MS-RTC EA 2; .NET CLR 1.1.4322; InfoPath.1; .NET CLR 3.5.30729; .NET CLR 3.0.30729)

CPU Class: x86

Platform: Win32

System Language: en-us

User Language: en-us

CookieEnabled: true

Exception Details

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Date: Thu May 19 16:27:20 CDT 2011

Message: 'undefined' is null or not an object

Url: https://mail.chicagotech.org/owa/14.0.694.0/scripts/premium/startpage.js

Line: 1

Call Stack

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onNavCal()

updSecNv(iM,sId,sBody,fnOnNav)

cbReqSecNv(oR)

cbOeReq(oAjaxRequest)

Owa.Dom.AjaxRequest.onComplete()

Owa$Dom$AjaxRequest$_cbOnReadyStateChange(i)

anonymous()

-----------------------

function anonymous() {

Owa.Dom.AjaxRequest._cbOnReadyStateChange(3);

}

----------------------- 

Detailed Call Stack

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onNavCal()

updSecNv(iM,sId,sBody,fnOnNav)

 iM = 1

 sId = 'LgAAAABsuRUGFZR4QLKbj/D49PnaAQAUhXOoc5RXRbGa5kBBPc+EAAB2UlQIAAAC'

Resolutions: 1. What we find is only outside OWA has this issue. If we run OWA internally, it works fine. We think it is something to do with the default gateway settings. After we did some testes, we fixes the problem by disabling Filter IDENT (Port 113) and Filter Anonymous Internet Requests as shown below. 

2. SonicWALL Security Appliance Platforms:
E-Class Secure Remote Access (EX SSL-VPN): 1600, 2500, SRA 6000, SRA 7000.
E-Class Services: Extraweb Web Translation
Firmware/Software Version: 10.5.2-035
Services: Extraweb Web Translation
Here is the workaround to address this issue, please follow the steps on the AMC console
• Login to AMC console
• Go to Services-->Web proxy service -->Configure -- >Web Application Profile->Choose the profile that has to be modified->Uncheck "Translate JavaScript code" under Content translation
• Save the profile and apply pending changes
• Login to workplace
• Access OWA-2010 it should work normally without any errors.

3. In Internet Explorer under the 'Tools' drop down menu, I selected 'Manage Add-ons'.

From there make sure 'Toolbars and Extensions' on the left is highlighted. On the right I selected all of my Divx add-ons and disabled them.

I closed my browser and re-opened it. I can now use Outlook Web Access !

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