Plesk license key update deferral or failure notification Print

Problem Description

• You receive an email notification indicating Plesk key update deferral notification
• You receive any notification about your Plesk license key not being able to renew
• Email notification or visual notification in Plesk indicates something like: Unable to update PLSK.XXXXXXX.XX: an error occurred while processing your key. You can try to retrieve the key manually in Plesk (Tools & Settings > License Management) or let Plesk try to update it in the next 24 hours. If you do not want to receive this notification any more, remove this key from Plesk.

Problem Resolution

First, login to Plesk and navigate to Tools & Settings > License Management. Click the Retrieve Keys button. It should indicate a success if the above error was simply a temporary issue.

Should the retreive keys button not resolve the issue, you will receive an error like "Could not update the license. Make sure that connections to the license server ka.plesk.com on TCP port 443 are not blocked. See how to do so."

This means your firewall is blocking access to the Plesk servers. The most common reason for this is that Plesk's licensing servers are in Switzerland and you've enabled Country wide blocking (including Switzerland). In your firewall, you must whitelist the Plesk licensing server IPs as described in this Plesk article. If you're using our preferred firewall solution, Imunify360, here's how to do that:

1. Login to Plesk as the admin or root user
2. Navigate to Imunify360 and then select the Firewall tab
3. Click on "White List" on the left, then the Add button on the right
4. Enter each of the Plesk Licensing servers IPs individually (from the above linked article) and use the comment "Plesk Licensing" for each
5. Repeat the steps above to retrieve a new license -- it should work now.