Realvnc Offline | License Key New

Back on the RealVNC licensing portal:

Q: Can I use a "RealVNC offline license key new" on multiple machines? A: No. Offline keys are strictly one-to-one (one key per System ID). If you need 10 offline PCs, you need 10 unique offline keys.

Q: Does an offline key allow me to bypass the license server? A: Yes, but it is a manual process. Offline keys do not check for concurrent user limits. If your license allows 5 concurrent connections, an offline key will still enforce that limit locally.

Q: My new offline key works, but VNC Viewer cannot connect. A: Offline licensing only concerns activation, not connectivity. Check your firewall rules and ensure VNC Server is running. An "active offline license" still requires open ports (5900/TCP default). realvnc offline license key new

Q: What is the lifespan of a new offline key? A: Typically the same as your subscription term (1, 2, or 3 years). After that, you must obtain a renewed offline key. The software will continue to run but display a license warning 30 days prior to expiry.

If you received an .rfx file (commonly offline_license.rfx):

  • Restart the VNC Server service: 
    sudo systemctl restart vncserver-x11-serviced
    (Or via Windows Services GUI).

    • You cannot generate an offline key directly from an air-gapped machine. Instead, use an internet-connected device to access the RealVNC Licensing Portal. Back on the RealVNC licensing portal: Q: Can

    Write these down or save them as a text file. You will transfer this information to the offline machine (via USB drive, scanned QR code, or manual entry).

    ⚠️ Important: Offline keys are often locked to a license server ID or a primary host ID. For server-based offline licensing, you may need to provide the host’s machine ID first (see Step 3 below).

    | Problem | Likely Fix | |--------|-------------| | "Invalid offline key" | Your subscription does not include offline rights. Upgrade to Enterprise. | | "Machine ID mismatch" | Offline key was generated for a different host ID. Regenerate using the correct machine ID. | | Key works but shows "expired" | Your subscription term ended. Renew before generating a new offline key. | | Cannot find offline option | Install the latest RealVNC Connect version (offline mode is absent in old free versions). | If you received an

    Even with a valid license, users frequently hit snags. Here is how to solve the top three errors for a new offline key.

    Cause: You generated the key using the Machine ID of an old network card or a virtualized MAC address that changed after a reboot. Fix: On the offline machine, run vncserver.exe -setmachineid=. You cannot manually change it. You must generate a brand new license request using the current, actual Machine ID.