Management Point Rejected policy request

• Check the Client GUID (e.g, GUID:D06707E1-69E6-485D-B3F3-6678511C53A2).

Run The Query Log on to SQL Server Management Studio and run this query against SCCM database
select * from dbo.system_data where smsid0 = 'GUID here'

• It will give you the PC name, then locate PC in SCCM collections, uninstall SCCM client then reinstall the client.
  
  

Query to Find Collections With Maintenance Windows

 Run this query against the SCCM site database using SQL Server Management Studio.

SELECT c.Name, c.Comment,SW.Description, SW.StartTime, SW.Duration FROM v_ServiceWindow SW JOIN v_Collection C ON C.CollectionID = SW.CollectionID ORDER BY c.Name