Each license has its own renewal period (Standard and Pro licenses include 1 year of free updates period). After that 1 year is over, you can use license without updating in the last available version of Xeoma forever or purchase renewal for 1 or 3 year. You can e.g. use Xeoma license for 1 year and when renewal period is over, you can use it for 1 (2, 3 etc.) years without updating, and when you need to update, you can purchase e.g. Xeoma renewal for 1 year and you will have 1 year of renewal period after activating that renewal.
>How many licenses shoul I renew of the 384 I have after 12 months but only 32 is over one year
You need to renew each license that has expired renewal period. You can purchase 1 renewal for 128 (256, 512 etc.) cameras or renewal for each 32 cams license:
http://felenasoft.com/xeoma/en/buy/#renewal, it depends on servers that you use. If you use 1 server, then you can purchase 1 renewal for all licenses (e.g. 256+128 cams).
Or you can purchase Xeoma Pro licenses with 3 years renewal in the first place:
http://felenasoft.com/xeoma/en/buy/#tarif