Hello,
In case you have unmanaged clients, you could not check the License status as you see in the Symantec Endpoint Protection Manager.
In your case, Open the .slf in the Notepad and you can obtain the license information.
Check these Articles:
Checking license status
http://www.symantec.com/docs/HOWTO55070
Licensing an unmanaged client
http://www.symantec.com/docs/HOWTO55368
Licensing enforcement rules
http://www.symantec.com/docs/HOWTO55135
Secondly, when you are connected to the Internet, you may like to visit Symantec Liveupdate website:
http://www.symantec.com/security_response/definitions/download/detail.jsp?gid=savce
from where you could download the Intelligent Updater which would assist you in Installing the definitions on the client which are not connected to the Internet.
How to update definitions for Symantec Endpoint Protection using the Intelligent Updater
http://www.symantec.com/docs/TECH102606
Hope that helps!!