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๐๐ฎ๐๐ฎ ๐ฟ๐ฒ๐๐ฟ๐ถ๐ฒ๐๐ฎ๐น ๐ณ๐ฎ๐ถ๐น๐๐ฟ๐ฒ๐ ๐ผ๐ป ๐ช๐ถ๐ป๐ฑ๐ผ๐๐ ๐ฆ๐ฒ๐ฟ๐๐ฒ๐ฟ ๐ฎ๐ฌ๐ฎ๐ฑ?
This is a typical Server Manager issue after deploying Windows Server 2025. You install a fresh domain, patch the servers, open Server Manager and see:
โ ๏ธ ๐ข๐ป๐น๐ถ๐ป๐ฒ – ๐๐ฎ๐๐ฎ ๐ฟ๐ฒ๐๐ฟ๐ถ๐ฒ๐๐ฎ๐น ๐ณ๐ฎ๐ถ๐น๐๐ฟ๐ฒ๐ ๐ผ๐ฐ๐ฐ๐๐ฟ๐ฟ๐ฒ๐ฑ
The issue has been around for quite some time and fortunately, the fix is simple.
๐ช๐ต๐ฎ๐ ๐๐๐ฟ๐ฝ๐ฟ๐ถ๐๐ฒ๐ฑ ๐บ๐ฒ, and finally pushed me to write this post, is that it is still happening. You install a fresh Windows Server 2025 environment, fully patch it, and basic Server Manager communication still fails out of the box.
The error is related to the maximum ๐ช๐ถ๐ป๐ฅ๐ / ๐ช๐ฆ-๐ ๐ฎ๐ป๐ฎ๐ด๐ฒ๐บ๐ฒ๐ป๐ envelope size. The configured value has not changed and is commonly still:
โก๏ธ MaxEnvelopeSizekb = 500
What appears to have changed is the ๐ฎ๐บ๐ผ๐๐ป๐ ๐ผ๐ณ ๐ฑ๐ฎ๐๐ฎ ๐ฟ๐ฒ๐๐๐ฟ๐ป๐ฒ๐ฑ by some Windows Server 2025 WinRM/CIM queries. Some responses seem to be slightly larger than the existing limit.
๐ฌ๐ผ๐ ๐ฐ๐ฎ๐ป ๐ฐ๐ต๐ฒ๐ฐ๐ธ ๐๐ต๐ฒ ๐ฐ๐๐ฟ๐ฟ๐ฒ๐ป๐ ๐๐ฎ๐น๐๐ฒ ๐๐ถ๐๐ต ๐ฃ๐ผ๐๐ฒ๐ฟ๐ฆ๐ต๐ฒ๐น๐น:
Get-Item -Path WSMan:localhostMaxEnvelopeSizekb
โ ย ๐ง๐ผ ๐ถ๐ป๐ฐ๐ฟ๐ฒ๐ฎ๐๐ฒ ๐ถ๐:
Set-WSManInstance -ResourceURI winrm/config -ValueSet @{MaxEnvelopeSizekb=”8192″}
๐ข๐ป๐ฒ ๐ถ๐บ๐ฝ๐ผ๐ฟ๐๐ฎ๐ป๐ ๐ฑ๐ฒ๐๐ฎ๐ถ๐น: the envelope size needs to be increased on both the computer running Server Manager and the managed server.
Once the value is increased on both sides, Server Manager starts retrieving the data correctly again.
Have you already seen this issue on Windows Server 2025?
