In this case, the systems had successful SCCM client installed, but the status remained In-Active despite several attempts of re-pushing the client and WMI remediation. One of the log files, “ClientIDManagerStartup.log” showed the below error messages:

[RegTask] – Client is not registered. Sending registration request for GUID:00XXX000-X00X-000X-0000-00XX00X000X0 …

RegTask: Failed to send registration request message. Error: 0x80040154

RegTask: Failed to send registration request. Error: 0x80040154

RESOLUTION:

This problem occurs if the MessageSizeThreshold value on the client is set to a value that is too low. For example, this problem may occur if the MessageSizeThreshold value is set to 5 or less.

To resolve this problem, change MessageSizeThreshold to a larger value. For example, set the value to 10.

1. Launch WBEMTEST: Go to Start Menu, and type wbemtest in the search bar. Ensure to run in elevated mode. 
2. Connect to the following namespace: root\ccm\policy\machine\actualconfig 
3. Click Enum Classes, and then select Recursive, and click OK. 
4. In the Query Result dialog box, double-click CCM_Messaging_Configuration. 
5. In the Object editor for CCM_Messaging_Configuration dialog box, click Instances. 
6. In the Query Result dialog box, double-click CCM_Messaging_Configuration.DummyKey=1. 
7. In the Object editor for CCM_Messaging_Configuration.DummyKey=1 dialog box, double-clickMessageSizeThreshold. 
8. In the Property Editor dialog box, change the value to 50 in the Value box, and then click Save Property.
9. In the Object Editor for CCM_Messaging_Configuration.dummyKey=1 dialog box, click Save Object.
10. In the Object editor for CCM_Messaging_Configuration dialog box, click Save Object, and then close all the Query Result dialog boxes. 
11. Exit Windows Management Instrumentation Tester.
12. On the client computer, restart the SMS Agent Host service (CcmExec.exe).