Hi,
Thank you for posting your query in Symantec community.
Q. What does a "Disable" status means?
--> It means that particular feature is disabled on SEP client.
1. Does it means the client is not communicating to SEPM,
--> Not really, as long as green dot is there can assume client is communicating with the SEPM.
2. Does it means the sep client is corrupted or defs. are corrupted, 3. Does it mean client machine is shutdown(offline)? or what are the possible reasons for "Disable" status in computer status report
--> Generally it won't happen due to definitions corruption, in that case it may show error like "PTP definitions are malfunctioning" Mostly disabled means either disabled by policy or by end user. Enabled means feature is up and running.
Actually you get more precise report when select sub-categories under computer status report.
There isn't any specific document which explain definitions of Enabled/Disabled. However, refer this guide:
About the different types of Symantec Endpoint Protection Manager Reports
http://www.symantec.com/docs/TECH95538