Users are unable to access OWA from certain browsers and receive a NavGuard message after logging on

This article applies to the following products:  
     Messageware NavGuard 2010

     Messageware NavGuard 2007

     Messageware NavGuard 2003

     Messageware NavGuard 2000

 

 

SYMPTOM

When a user tries to connect to Outlook Web Access, they receive the following message:

Messageware NavGuard Security Event

 

A security policy from this Outlook Web Access website has blocked your web browser. To access this website please do one of the following:

 

1.     Check for updates for your web browser

2.     Use a different web browser

 

CAUSE

NavGuard includes a settings.xml file which contains a list of browsers that are allowed or blocked from accessing OWA based on their user agent string value. When a login request is processed, NavGuard checks to see if the browser’s user agent string is listed in the exception list labeled <MEASURE ID="114"> in the NavGuard settings file. If the user agent string is not listed, NavGaurd will block the browser request and show the above message to the user.

RESOLUTION

Although the NavGuard settings file is configurable by the Exchange Administrator, we suggest contacting our Support department for any assistance in modifying the settings.xml file as changing an incorrect setting or value may cause undesired behavior.

MORE INFORMATION

The above information is specific to the user agent string value that is configured in the browser and not based on the type of device that is being used, for example desktop, laptop, PDA, Tablet, etc.

Messageware product's functionality is not supported on mobile devices at this time. For a list of supported browsers, please refer to the product documentation.

REFERENCES

 

Understanding user-agent strings

http://msdn2.microsoft.com/en-us/library/ms537503.aspx

 

This article applies to the following products:  
     Messageware NavGuard 2010

     Messageware NavGuard 2007

     Messageware NavGuard 2003

     Messageware NavGuard 2000