You can pause the custom On-Demand Scan and policy based On-Demand Scan running on the client system from Trellix ePO - On-prem.
Select Menu → Client Tasks → Client Task Catalog.
From Client Task Types, select Endpoint Security Threat Prevention → Pause On-Demand Scan.
Click New Task.
Make sure Pause On-Demand Scan is selected and click OK.
Provide the task name and click Save.
Click Menu → System Tree → Systems and select the client system.
Click Actions → Agent → Run Client Task Now.
In the Run Client Task Now page, do the following:
In the Product list, select Endpoint Security Threat Prevention.
In the Task Type, select Pause On-Demand Scan.
In the Task Name, select the required task name.
Click Run Task Now.
Click Server Task Log to check the status of the paused scan.
The ongoing scans are paused and the paused scans are resumed during the next scheduled scan or when you reboot the system.
Note
You cannot pause the Full Scan or Quick Scan initiated from the Endpoint Security Client.