Hello
Thank you for your question and reaching out.
Make sure the cluster group, clustered service, or application that you are adding the host to has a Network Name and IP Address resource before clustering a BizTalk host. If a Network Name and IP Address resource is present in the target cluster group, the Network Name resource is added as a dependency to the clustered BizTalk host. The BizTalk host won't work properly as a clustered resource if these resources are unavailable.
A related cluster resource is established in the chosen cluster resource group when you cluster a BizTalk host. Each cluster node that is currently available is added as a potential owner of the cluster resource when it is built. Before clustering a BizTalk host, you should add an instance of the host to all accessible nodes of a cluster because a cluster resource can be failed over to any node in the list of possible owners. A clustered BizTalk host cannot be switched over to a BizTalk Server computer that doesn't already have an instance of the host running on it.
Considerations and Known Issues : https://learn.microsoft.com/en-us/biztalk/core/how-to-configure-a-biztalk-host-as-a-cluster-resource1
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