What do you mean by SCCM client check?
When the Configuration Manager client (software) is installed on your Windows devices, you can monitor their health and activity in the Configuration Manager console. Configuration Manager provides different types of information on the client status, such as client checks, client activity, client online status, etc. Generally, a Client check describes the status of the periodic evaluation carried out by the Configuration Manager client on the device. This evaluation can identify some of the problems with the device and remediate them if necessary.
