Event ID - 13021

Event Id13021
SourceWindows Server Update Services
DescriptionSome client computers are not reporting their inventory. %1 have been detected so far.    
Event InformationAccording to Microsoft :
Cause :
Clients report their software inventory to the server.
Resolution :
Client inventory collection is not working correctly.
Possible resolutions include:
1.Check permissions on the client Web service directory.
a.Open a command window.
b.Type cd \Inventory
c)Type cacls
d)The following ACEs should be set:
1.a)NT AUTHORITY\NETWORK SERVICE:(OI)(CI)R
2.b)BUILTIN\Users:(OI)(CI)R
3.c) AUTHORITY\Authenticated Users:(OI)(CI)R
4.d)BUILTIN\Administrators:(OI)(CI)F
5.d)NT AUTHORITY\SYSTEM:(OI)(CI)F
6.e)Check the IIS configuration of the reporting Web service using the IIS script adsutil.vbs.
Verfy :
Look for the corresponding error event.
a)Open a command window.
b)Type cd \Tools
c)Type wsusutil checkhealth
d)Type eventvwr
Reference LinksEvent ID 13021 from Source Windows Server Update Services

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