Endpoint Protection

I am experiancing an issue where our test SEP environement where the SEPMs are not pulling content down from our internal liveupdate server.

This used to be working fine however in the past few months any attempt at initiating a liveupdate results in the following messages:

"no updates fround for......"

"LUALL.EXE Finished. There were no new contnet updates. Return code = 1"

"Liveupdate Succeeded"

we connect to our internal liveupdate serve via a proxy, and i have confirmed that connectivity exists between the SEPMs and Proxy server as well as proxy server to the internal liveupdate server.

In our Production environment Liveupdate DOES pull down content fron the same internal liveupdate server successfully, and the same proxy is also used. So im not sure why its working in our prduction environment but not the test environemnt.

Any advice or suggestions on what may be going on here would be much appreciated!

Thanks. 

Try these steps sounds like liveupdate may have lost it's link 

To register SEPM with LiveUpdate:

1. Click Start, then Run.
2. Type cmd , click OK.
3. At the command prompt type CD and the path to lucatalog.exe. By default the command would be: 
   cd C:\Program Files\Symantec\Symantec Endpoint Protection Manager\bin (change drive to where ever your SEPM is located). 
4. Type lucatalog -cleanup
5. Type lucatalog -update
6. Run Live Update

https://support.symantec.com/en_US/article.TECH95830.html

Tried this but no luck :(

Have you tried a repair on the SEPM? Also try the SymDiag tool to see if there any communication issues the tool can see. 

click on start- run type luall.exe

can you confirm if its going to your internal Luadmin?

as suggested by GeoGeo a repair will also re-register the liveupate. You may  need to check if your Luadmin has downloaded the latest defs so that SEPM can pick it from there