Changing the License Type and Key of a SharePoint Subscription Farm

The installfeatures failure means the Standard-to-Enterprise conversion cannot complete configuration; it is not a key-entry problem. There is no supported switch that safely bypasses that stage. First, return the SharePoint Timer service to the farm service account rather than Local System. Verify all six servers have the same SharePoint products and patch level, with no pending restart. Then check Central Administration’s Upgrade Status and the PSConfig and ULS logs for the first SkuUpgradeJob or feature-installation error and correlation ID. Retry only with the designated farm administrator, which must be a local administrator on every SharePoint server and hold the necessary SharePoint and SQL permissions. If installation still fails after the farm is consistent, open a Microsoft support case and provide those logs. Because this farm has no production content or customizations, rebuilding it with the Enterprise key is the cleanest supported fallback; forcing PremiumFarm or manually clearing jobs is not.