Motion detection can be enabled by a few different methods.
a) Use AV100 to enable motion detection as described in the below related article.
b) Access the web interface of the camera and click on the 'Motion Detection' button along the top menu bar. Motion detection can then be configured and enabled using the toggles under that menu item. This function is only available on newer firmware revisions on H.264 and MJPEG cameras. After you enabled this function in the web page, please make sure you go to administration tab or system tab to click save all settings to flash or save all before close out the browser session to save the settings you have done.