open the collection that the computer is a member of, click on Update collection Membership, then refresh the collection
If the Client=No then you may have client issues, check the following logs for problems on the Client.
Clients won't get any advertisements in the target collection until the collection reflects the fact that the systems are installed as clients (Client = Yes).
First, verify that the SMS Agent Host service is installed and running. If it is, the Advanced Client really is installed. If it doesn’t show up in the All Systems collection, it might be either that the client is not assigned to a site or that the client cannot find the default management point in its assigned site. You can use the Advanced tab of the Systems Management program in Control Panel to verify that the client is assigned to a site. If not, you can configure the site code the client should be assigned to. If it is assigned to a site, view the LocationServices.log on the client (Windows\System32\CCM\Logs) to see if the client was able to retrieve the default management point for the assigned site. It may be that the management point installation failed due to lack of IIS or BITS services being installed prior to the management point role being assigned to the computer.
ClientLocation.log to ensure that they are assigned to a site
LocationServices.log to verify that they have found the default MP
ClientIDManagerStartup.log to verify that they've registered with the site
Ccmexec.log to verify that there are no HTTP errors
if all of the above are ok then consider uninstalling and reinstalling the CCMclient
to uninstall it open a cmd prompt with administrative privaledges and navigate to c:\windows\ccmsetup
Once done, verify it is gone in control panel, wait a few minutes then reinstall it by pushing it via ConfigMgr console.