How many Licences per Exchange Cluster?
I was talking to a customer this morning about Exchange and configuring Active/Active/Active/Passive clustering and the topic came around to licences and how many were required in the cluster. I get this question quite frequently in customer meetings, so I thought I'd see if the information on the web was clear enough. From the Exchange web site it says: "All servers in a cluster that are running Exchange Server require a licence. Note that Exchange Server 2003 Enterprise Edition is required for clustered configurations"
This means that the Passive Exchange node also needs a licence which was the part my customer was unaware of. Exchange has been installed on the passive node, but not initialised as part of cluster fail-over: therefore it needs a valid licence.