How to decode Imunify360/AV+ license key on Plesk

Issue

The key I use to activate Imunify360 provided by Plesk is invalid.

Environment

• Imunify360
• Plesk

Solution

In this case, the key needs to be extracted from the users Plesk account; for this, go into Tools & Settings > License information > Additional keys > Download the key file and send it to us to decode it:

Look for the key body in the .key file, example:

<!--Key body-->

<aps-3:key-body core:encoding="base64" core:type="binary">xxxxxxxxxxxxxxxxxxx==</aps-3:key-body>

The "xxxxxxxxxxxxxx" section is where your undecoded key is located.

You can use https://www.base64decode.org/ to decode it with source character UTF-8

The decoded key should start with "IM" followed by a number such as 1, 30, 250, UN and then more random characters. This stands for the type of license the key is: Single user, 30 users, 250 users 
Unlimited users.

Now to activate your license, you can enter this key on the Imunify panel or using the command (as root):

imunify360-agent register <YOUR KEY>

In case of ImunifyAV+

imunify-antivirus register <YOUR_KEY>