Link: DanteDog’s Virtualization Blog: High Availability for VCMS? It’s Clustered!.
Recently VMware Technical Support Posted KB Article 1006803
which shows a supported method for clustering VirtualCenter Management
Server 2.5 using Microsoft Clustering Service. It isn’t the only way
supported, and VMware Support will work with you if you are trying a
clustering method that is a little different, but this is one
documented method.
A detailed description and reference, along with screenshots and steps, is provided on our new VI:OPS site (which just went live) in DOC-1111.