Something here may help.
https://cloudblogs.microsoft.com/windowsserver/2017/01/09/why-wsus-and-sccm-managed-clients-are-reaching-out-to-microsoft-online/
--please don't forget to Accept as answer if the reply is helpful--
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Hi,
I have problem to do update, within Win 2016 server. Please help
Something here may help.
https://cloudblogs.microsoft.com/windowsserver/2017/01/09/why-wsus-and-sccm-managed-clients-are-reaching-out-to-microsoft-online/
--please don't forget to Accept as answer if the reply is helpful--
Hi Jackson,
Thanks for your posting on this forum.
This is a common issue. Have you tried any steps to troubleshoot?
Here is an article for your reference:
https://appuals.com/fix-we-couldnt-connect-to-the-update-service-on-windows-10/
Note that this link is not from MS.
Please try the above steps first. If it is not helpful, it is recommended to check the Windowsupdate.log. Please remember to share with me the error informations if there are have.
Regards,
Rita
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