Follow these steps to enable activity logging for on-demand scan in a managed systems.
Log on to ePO - On-prem as an administrator.
Go to Menu > Policy Catalog > Endpoint Security Common.
In the Endpoint Security Common page, click Policy Category > Options > My Default.
Click Show Advanced on the top left corner of the page.
In the Client Logging section, enable these options:
Enable activity logging.
Enable log for all scanned files during on-demand scans.
Enable Limit size (MB) of each of the activity log files and set the log size as 20MB.
Navigate to System Tree, and click on the Assigned Policies tab and in the Product section, select Endpoint Security Common.
Select Endpoint Security Common from the Product list, then click Edit Assignment.
In the next page, click Break inheritance and assign the policy > My Default > Assigned Policy and select the Save option.
In the System Tree page, select the system to assign the policy. Click Wake Up Agents, and select Force complete policy and task update and select OK.
Endpoint Security Common Policy by default gets enforced on the selected system.