missing updates on MS Update Catalog

tato386 41 Reputation points


It seems like some Windows 2016 server 1607 cumulative updates are missing from the update catalog site. I am looking for Sep 2020 (KB4577015) but cannot find it. I can see June 2020 and November 2020 but July, August and Sept are not there. Maybe I need to search in a different way? Please advise.


Windows Server
Windows Server
A family of Microsoft server operating systems that support enterprise-level management, data storage, applications, and communications.
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  1. Leon Laude 85,686 Reputation points

    Hi @tato386 ,

    Looks like the KB4577015 update does indeed not exist in the Microsoft Update Catalog, if you require the update you can contact Microsoft support over here:


    If the reply was helpful please don't forget to upvote and/or accept as answer, thank you!

    Best regards,

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