Our license is expired since yesterday and I want to reactivate it. But I don't see any place to enter my ServerID and retrieve a license key. I checked https://licenses.mendix.com/, but I only see my license is expired and I see a new one. But it's not possible to reactivate it. This application is deployed in the custom Mendix cloud. How can I reactivate my license?
Do you mean the so-called 'putty-cloud'? If you're using m2ee-tools on a hosted environment at Mendix, you can use the activate_license command:
The command activate_license will set the license key used in this application.
Paste your license key (a long text string without newlines) or empty input to abort: <paste it here!>