See a Helpscout comparison table.
In LiveAgent agent panel navigate to Configuration > System > Plugins. Find the 'Help Scout Data Migration' plugin and click on 'Activate' button next to it.
Then you have to reload the agent panel. After reload go back to the Plugins section and click on 'Configure' button next to the plugin.
In the configuration popup you have to enter:
- Helpscout API key - in your Helpscout account navigate to your profile>API Keys>click on Generate an API Key button and use the copy the generated API key
Paste the API key here:
In the plugin configuration hit 'Save' and you are done. LiveAgent imports tickets from Helpscout in the background.