How to use old Fireworks licenses without a sufficient number of creative cloud accounts?

I know that Adobe is no longer developing Fireworks CS6, but what about old licenses?

My company bought four licenses in October 2014 and I don't know if they are still active or not, could you please tell me how to verify if they have automatically expired?

Now we have only three creative cloud accounts (Creative Cloud for enterprise), does it mean that only three of us will be able to install and use Fireworks?

Thank you in advance for your support.