ou are an enterprise administrator for Cer-tech .com. The company runs Windows Server 2008 on all theservers on the network. One of the servers， Server01 has the Web Server （IIS） role installed. An application called App1 runs on Server01. Due to some requirement， you need to make some configurationchanges to App1. However， after those changes， the users report that the application fails. To diagnose theproblem， you checked the event log and discovered an error message saying "503 Service Unavailable"appearing.
Which of the following options would you choose to ensure that users are able to connect toApp1？（）

You have a server that runs Windows Server 2008 Enterprise Edition. The server has the FailoverClustering feature installed. The server has three nodes named NODE1， NODE2， and NODE3. The Microsoft Distributed Transaction Coordinator （MSDTC） resource is installed on the cluster. The cluster hasa dedicated cluster group named Group1 that includes the MSDTC resource. You discover that Group1 isunable to failover to NODE3 from NODE1 or NODE2. The failover from NODE1 to NODE2 functionswithout errors.
You need to configure Group1 to support the failover between all cluster nodes.
What should you do？（）