Number one, the Adobe Creative Cloud Desktop App. Do not sign out, if you do, the apps get deactivated. Re-activating requires signing back in, and if you are without internet, you are out of luck. If you are signed in, hence no deactivation, and you go somewhere without the internet, do big deal (normally) .
Number two, the Adobe Creative Cloud Desktop App. If (and I do not think this is your case) you are going on a trip without internet for a long time (how long a bit of math when your subscription was last authenticated, and ho long you will be away) consider intently signing out, then signing back in, to force a fresh authentication. This is a specialized situation.
Ahh, one inquiry, your OS was not listed on your post. Is it perhaps Windows, and specifically Windows 7 (or even worse 8)?