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There are two types of Enterprise Vault installation that you can convert to a Microsoft server cluster: a single, non-clustered Enterprise Vault server, and a building blocks configuration that contains multiple Enterprise Vault servers, provided no server is running in failover mode.
To be eligible for conversion to a cluster, the existing Enterprise Vault installation must meet the following conditions:
Enterprise Vault should already be configured in a non-clustered configuration, and it must not already be part of a cluster.
Enterprise Vault must be configured using DNS aliases rather than fully qualified node names.
The Enterprise Vault server must have a full set of Indexing, Shopping, Task Controller, and Storage services.
Neither Compliance Accelerator nor Discovery Accelerator must be installed on any server in the planned cluster. These products are not supported within a cluster. However, an unclustered Compliance Accelerator or Discovery Accelerator can reference a clustered Enterprise Vault virtual server.
You can cluster an existing Enterprise Vault installation in any of the operation modes previously described. Note that:
To convert an existing Enterprise Vault installation to a Microsoft server cluster
Install Enterprise Vault on the failover nodes and, if required, on any additional primary nodes you are adding to the existing installation. Do not run the Enterprise Vault Configuration wizard on any node at this stage. For instructions on installing Enterprise Vault, see Sections I and II of this manual.
Convert your existing Enterprise Vault servers to servers with cluster support.
If you are adding any new Enterprise Vault servers, configure the new Enterprise Vault servers as servers with cluster support.
More Information
Preparing to cluster Enterprise Vault with Microsoft server clusters
Converting an existing Enterprise Vault server to a server with Microsoft cluster support
Configuring a new Enterprise Vault server with Microsoft cluster support