I’m pretty sure the original suggestion was 7 days before expiry, but not sure what was actually implemented.  

There’s always the option to make a weekly api call to check the expiry date and notify when x amount of days left

I’ve often gone the old school route and added something to my email calendar!

If you go to System Configuration → System Events → Configurations → License About to Expire you can set the notification schedule. It defaults to 7 days like ​@ebygomm said.

You can also add email settings right there, so no need to set up an Automation.

​@redgeographics That is quite handy that you can change the notfication shedule!

I have one question:

1. Do you get one notification (for example 31 days in my case) or is it possible to get more notifications, let's say 1 month, 1 week before the license is about to expire?

According to the screenshot you get one daily, so if you have it set to 7 days you get one 7 days before, 6 days before, 5 days before etc.

​@ebygomm I overlooked that, thanks for pointing that out