OWA access for Internet Explorer 11 users is blocked on Windows 8.1 by Messageware NavGuard

This article applies to the following products:

Messageware NavGuard 2007

Messageware NavGuard 2010

 

 

SYMPTOM

 

When a user tries to connect to Outlook Web Access using Internet Explorer 11 on Windows 8.1 and Windows 7, 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 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 <ITEM 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

 

Note: Restart the World Wide Web Publishing service

Apply changes on all servers where Messageware NavGuard is installed

 

1. On the CAS, navigate to \Program Files\Messageware\NavGuard\Settings

2. Right click on the SWSettings.xml and select Edit

3. Locate <ITEM ID="114" and add the user agent for Internet Explorer 11 to the end of the line (i.e. |*rv:11.0*"/>)

4. Select File > Save

5. Restart the World Wide Web Publishing service

 

 

 

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 2007

Messageware NavGuard 2010