To understand why generic “lists” fail, you need to know how keys work.
These keys allow you to install the software but still require a legitimate activation. For example: NMMKJ-6RK4F-KMJVX-8D9FJ-M6VKM (This is a known KMS client key for Office 2019 Pro Plus – useless for individual activation). microsoft office 2019 product key list top