What happens if you go beyond the license expiry date in Ax?

If you have an expiry date on your license of Ax or if you are using a demo license key of Ax, at some point in time the license will become invalid.
What happens is that Dynamics Ax will start to run in demonstration mode. 
Yes, you can keep using the system.  The AOS will not stop.  But....   you are faced with some limitations in the system.

• The AOT is no longer available for editing, so no more custom coding.
• There is a maximum of 2 concurrent users.  If more users try to log on, you can get following error message:

• You cannot enter a date in a datefield on a form, that is beyond the license expiry date.

So all in all you can use Dynamics Ax as your online archive, but no longer for your daily operations.