Learn Editor: Update linux-support-offline-security-intelligence-update.md

Author: yujiaoMSFT

defender-endpoint/linux-support-offline-security-intelligence-update.md

@@ -237,7 +237,7 @@ offline_definition_update_fallback_to_cloud : false[managed]
 
 ### Automatic update
 
-- If the fields `automaticDefinitionUpdateEnabled` and `offline_definition_update` in the managed json are set to `true`, then the "offline security intelligence updates" are triggered automatically at periodic intervals.
+- If [enforcement level for Antivirus engine](https://learn.microsoft.com/en-us/defender-endpoint/linux-preferences?view=o365-worldwide#enforcement-level-for-antivirus-engine) is set to `real_time`, and the fields `automaticDefinitionUpdateEnabled` and `offline_definition_update` in the managed json are set to `true`, then the "offline security intelligence updates" are triggered automatically at periodic intervals.
 - By default, this periodic interval is **8 hours**. But it can be configured by setting the `definitionUpdatesInterval` parameter in the managed json.
 
 ### Manual update