wsus servers not reporting in?

 I have a wsus server, and over 150 windows servers. Most of my windows are now reporting in the WSUS server. Some of them are not reporting how I find out why, and what can I do. Thank you
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Check the windows update log on the clients - C:\WINDOWS\Windows Update.log and look for any errors.

Good WSUS resources to investigate any errors -
zenworksbAuthor Commented:
i checked and there ar eno errors?
run wuauclt /detect and post log entries.

also, take a look at these

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Windows Server 2003

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