Hi

Need to know reason behind why SEP clients showing Out-of-date

Regards

few reasons, client not communicating with SEPM

Corrupt Defs, if getting update from GUP, GUP may not have full defs to server

It show because antivirus of the clients are not up to date.

Hi Rafique

Thanks for the answers.

Any more reasons and also can you let me know precautions to be taken to avoid it in future

Regards

Some reasons for out of date showing in SEPM ?

1) Client are corrupted .

2) Client are not communicated with SEPM server .

3) SEP client system proper disk space not available.

4) Corrupted virus defination and more reason you can enabled sylink log

Troubleshooting Symantec Endpoint Protection

How to enable Sylink debugging for the Symantec Endpoint Protection 11.x and 12.1 client in the Windows Registry

Symantec Endpoint Protection: LiveUpdate Troubleshooting Flowchart

You cannot say for sure what causes this behaviour as there could be more reasons, 

1) Check all the Liveupdate policy on your groups, check how many of them get updates from SEPM, GUP, Internet, Luadmin

2) Check computer status report, Check the defs date, If they are out of date, Check the last connection time of the Client, see how its confgured to get updates

3) Keep this handy if you face any 

Symantec Endpoint Protection: LiveUpdate Troubleshooting Flowchart

http://www.symantec.com/business/support/index?page=content&id=TECH95790