It sounds basic, but the Horizon Console is sensitive to hidden characters.
For these subscription models, you don't actually "type in" a traditional 25-character key. Instead, the license is pushed from the Horizon Cloud Service to your on-premises Connection Server. If you try to force a subscription ID into the standard license field, it will return as invalid. Steps to Resolve
VMware Horizon comes in several flavors: Standard, Advanced, and Enterprise.
When copying a key from a PDF or an email, you often pick up a leading or trailing space. Try pasting the key into Notepad (to strip formatting) and then manually typing it into the Horizon Console.
Keys are generally version-specific. If you have upgraded from Horizon 7 to Horizon 8, your old license key will not work. You must log into the VMware (Broadcom) Customer Connect portal to find your upgraded Horizon 8 keys.
