The CITRIX-XML-SERVICE NetScaler built-in monitor fails after Hotfix Rollup Pack 2 for Citrix XenApp 6 for Microsoft Windows Server 2008 R2 is installed.

However, XenApp continues to work.

The following message appears when you view the monitor.
"Failure – TicketTag not found in the response"

With XML integrated with IIS, the following response can be viewed.

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE NFuseProtocol SYSTEM "NFuse.dtd">
<NFuseProtocol version="5.2">
    <ResponseAddress>
      <ErrorId>service-unavailable</ErrorId>
      <MPSError type="IMA">0x8000000B</MPSError>
      <BrowserError>0x00000024</BrowserError>
    </ResponseAddress>
</NFuseProtocol>

With XML running as a service, the following response can be viewed.

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE NFuseProtocol SYSTEM "NFuse.dtd">
<NFuseProtocol version="5.2">
    <ResponseAddress>
      <ErrorId>no-alt-address</ErrorId>
    </ResponseAddress>
</NFuseProtocol>

Install LIMITED RELEASE - Hotfix XA600R02W2K8R2X64011 - For Citrix XenApp 6.0 for Windows Server 2008 R2 - English to resolve this issue.