Adobe has prepared this informations: https://helpx.adobe.com/x-productkb/policy-pricing/activation-network-issues.html
>>> Additional information for users who are temporarily unable to connect >>> ...I quote:
What happens if it's necessary to be offline for a while?
The Creative Cloud software makes a call to Adobe servers once a day to verify the account status.
If the account is in good standing (that is, payment is up-to-date) when the last call happens, the software status is refreshed to run for at least 99 days while being offline.
Note: Signing out and signing back in (while online) just before going offline for a long period ensures that the software works for at least 99 days without needing to connect.
The software still reminds you to connect to the Internet during this time. These reminders can be suppressed until the last 30 days, when a daily message prompts you to go online and refresh the software status.
Thanks; I have already read that.
I will be online in order to activate the program, but after that the computers will never be connected to the Internet again.
I am told that it must get confirmation every 90 days or so or it will stop working.
How can I give that confirmation without going online.
is there a license file or something I can download from a connected PC, then copy onto the off-line PCs?
If you have CS6, you have a permanent license and you do not need the internet. You only need the internet connection if you have Creative Cloud.