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Offline licence activation after version update?



I installed 18.1 over my current 17.1 installation of PRTG. After then install and reboot i was asked to verify my licence. The server does not have internet access so I selected offline verification. After generating the activation file I copied the contents back on the licence page. I clicked the button to verify the licence but nothing happened.

I had to roll back to 17.1 and still have not successfully updated my version. My maintenance plan does not expire until 10/2018.

activation new-version offline

Created on Feb 14, 2018 9:11:25 PM

1 Reply



Hi there,

Please send us an email about the issue to [email protected] and your license key (last 6 digits suffice).

Kind regards,


Created on Feb 15, 2018 11:04:04 AM by  Erhard Mikulik [Paessler Support]

Disclaimer: The information in the Paessler Knowledge Base comes without warranty of any kind. Use at your own risk. Before applying any instructions please exercise proper system administrator housekeeping. You must make sure that a proper backup of all your data is available.