Updated: July 10, 2020 (November 24, 2003)
Charts & IllustrationsGeneral Rules for All Server Products
The following rules apply to all Microsoft server productsOSs and applicationsdiscussed in this report, unless specifically mentioned otherwise.
For exceptions, see the appendix, “Notes for Each Server Application“.
| General Rule | Explanation | Exceptions |
| Server machines that sit on the sidelines, only to be put into production use when another machine fails, still need to be fully licensed. | Server machines used solely to increase availability in the face of system failure need to be fully licensed. This includes passive nodes in an active/passive failover cluster. In this scenario, the passive machine does no useful work until it automatically detects that one of the active machines has failed. This rule also applies to “hot spares”preconfigured machines that are manually placed into service by administrators to temporarily replace a production machine that has failed. |
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| Running only a portion of a server product still requires that the |
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