You can improve availability in the following ways when you use the adapter:

• Set up a fault-tolerant hosting environment for BizTalk Server 2006.
  
  
• Use Windows Clustering with IBM WebSphere MQ.
  
  

For information about fault tolerance and BizTalk Server 2006, see Sample BizTalk Server Architectures and Planning Your Platform for Fault Tolerance in BizTalk Server 2006 Help.

To ensure that the BizTalk Server MQSeries Adapter is able to communicate with a remote installation of the MQSAgent component, ensure that you have enabled network COM+ access on the BizTalk Server and server where IBM WebSphere MQ is installed. For more information about enabling network COM+ access, see Microsoft Knowledge Base article number 817065, " How to enable network COM+ access in Windows Server 2003," available at http://go.microsoft.com/fwlink/?LinkId=59124.

For more information about clustering IBM WebSphere MQ, see the IBM WebSphere MQ documentation. For more information about configuring MSDTC in a Windows cluster environment, see Microsoft Knowledge Base article number 290624, "How to configure MSDTC in a Windows 2000 cluster environment," available at http://go.microsoft.com/fwlink/?LinkId=57579.

There is no requirement to cluster the MQSAgent (MQSAgent2) COM+ application that is used with the BizTalk Server 2006 MQSeries adapter. To provide high availability for this component, install the component on each cluster node. If the COM+ application stops, the next call from the client will start it.