Activation servers are sensitive to time discrepancies. If your system clock is off by even a few minutes, activation will fail. Go to > Time & Language > Date & Time . Ensure Set time automatically is toggled On . Click the Sync now button to force a refresh. 2. Run the Activation Troubleshooter
If you are using a Volume License and are on your organization's network, you can try forcing the activation manually. Open as an Administrator . 0xc004f074 office activation error