A couple of years ago I requested the free 3DES/AES license for a PIX 501. The existing license key on the PIX was for 50-users, when I applied the new license it upgraded it to 3DES/AES but was restricted to 10-users. Since I didn't actually need the 3DES/AES license and only got the key as it was free I re-applied the previous license (this wasn't a production device anyway).
I will be upgrading a failover pair of PIX 515's shortly for a customer from 6.x to 7.2. I have checked the current license and it is unrestricted with failover but only DES. I would like to apply the 3DES/AES license for them but fear the free license key will 'downgrade' it to a restricted license with no failover.
Has anyone done a similar upgrade and used the tool to generate a free 3DES/AES license for an unrestricted PIX?