1. Do I need to update to a newer version of SEPM?
-- Yes from https://fileconnect.symantec.com but for that you need a serial number which would start with Mxxxxxxxxxx.
2. The virus definitions on here don't look like they've updated since the beginning of January. So I'm not sure how or why this stopped working properly.
-- There could be several reasons like client failed to connect to the SEPM server to get the updates or the virus definitions got corrupted, etc... Once you upgrade to the latest verision it should fix the issue.
3. Do I need to download and install this "LiveUpdate Administrator" program to be able to update the server side? (LUAESD.exe)
-- No. If the SEPM server can connect to the internet there is no point installing LUA on the same server.
4. I've read until my eyes bled today trying to figure this out on my own with no success.
-- You should've posted this before or have called Symantec Support :-).
5. It looks like it is communicating with the client machines just fine, but looks like live update is disabled for the clients.
-- Thats normal behaveiour as the default LiveUpdate policy says to disable Liveupdate button so the user cannot download it manually.
6. There's no proxy servers involved. Nothing set for proxy servers addresses.
-- If it would've been proxy the client would've not communicated with SEPM.
7. Under the Site Properties for the Local Site (Site HOSTNAME), under Edit Source Servers, it is set to use a specified internal LiveUpdate server. It has the proper hostname specified and the address is that of the server that SEPM is loaded on with port 9090 specified on the end of the IP address.
-- Please uncheck the radio button from use a specified internal Liveupdate server.
8. If I click on "Download LiveUpdate Content" it gives me the message, "An unexpected exception has occured [Site: Site HOSTNAME] [Server: HOSTNAME]" over and over and over.....
-- Please upgrade to SEP RU6 MP1.