Horizon uses the friendly name on its SSL certificate to validate identity. If this is misconfigured, the licensing service may fail to communicate properly.
When you enter a license key, the Connection Server attempts to "phone home" to the VMware/Broadcom licensing servers to validate the entitlement. If your server is in a dark site (no internet access), the validation will fail. horizon connection server license key is invalid
Run on Connection Server (command line as admin): Horizon uses the friendly name on its SSL
| Action | Details | |--------|---------| | | Get a 60‑day eval key from VMware Customer Connect to rule out server corruption. | | Check time sync | If Connection Server time is far from real time, license validation can fail. Sync with NTP. | | Review license entitlement | Log into Customer Connect → Licenses → confirm key is active and not assigned to another product (e.g., vSphere, vSAN). | | Contact VMware support | Provide vdmadmin -L output and the key (last 5 chars only if public). They can verify if the key is truly valid. | If your server is in a dark site
To ensure the license applies correctly, the server must meet these baseline prerequisites: