Maybe this one.
https://learn.microsoft.com/en-us/iis/troubleshoot/performance-issues/troubleshooting-iis-compression-issues-in-iis6-iis7x
IIS compression works on windows server 2003?
Hi, i have a website running in windows server 2003 for internal use and i wish to know if the IIS compression works in this older version of windows server.
Windows development | Internet Information Services
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Sam Wu-MSFT 7,566 Reputation points Microsoft External Staff
2022-06-03T06:52:06.06+00:00 IIS compression works on windows server 2003?
Yes, HTTP compression is also available in IIS 5.0, and the version of IIS in windows server 2003 is IIS 6.0, so IIS compression is available in Windows Server 2003. but Windows Server 2003 is outdated, and I suggest you stop using it. more information you can refer to this link: http-compression-on-iis-6-0-windows-server-2003.
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