About this functionalities of OpManager, it disables the setting in OPM and not on the switch? Or using this option will disable the port on the switch?

How to disable switch ports?

If you want to administratively disable an interface, it is possible with OpManager in just a few clicks. Here are the steps:

Go to the required snapshot page of the interface you want to disable que.

Under Interface tab, click the Disable button.

The interface gets disabled and the interface's status is changed to Down. To enable the interface again, go to its snapshot page and click the Enable button under the Interface tab.