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This is just in reference to this thread that I found very helpful but am unable to add a comment.

All microsoft delivery optimization - regex.... | Community

Just in case people find it helpful, I found that the regex wasn’t capturing everything and had to add a few of my own.

\b(?:\d{1,3}\.){3}\d{1,3}\b\/filestreamingservice\/files\/.*
\b(?:\d{1,3}\.){3}\d{1,3}\b\/.*\/filestreamingservice\/files\/.*
\b(?:\d{1,3}\.){3}\d{1,3}\b\/filestreamingservice\/\/files\/.*
\b(?:\d{1,3}\.){3}\d{1,3}\b\/.*.intunewin.bin
\b(?:\d{1,3}\.){3}\d{1,3}\b\/.*\/ctldl.windowsupdate.com\/msdownload\/update\/v3\/static\/trustedr\/.*
\b(?:\d{1,3}\.){3}\d{1,3}\b\/pr\/.*\/Office\/Data\/.*
\b(?:\d{1,3}\.){3}\d{1,3}\b\/d\/msdownload\/.*
\b(?:\d{1,3}\.){3}\d{1,3}\b.*\/msdownload\/.*
 

I found that the following examples were being blocked:

70.156.87.153/c/msdownload/update/software/updt/2025/03/windows11.0-kb5054980-x64-ndp481_d8ca7b3b24823cc8480dbe3cf3355ae0ca0c311e.cab?cacheHostOrigin=2.au.download.windowsupdate.com

177.128.210.198/filestreamingservice//files/8e9cd08d-38a9-4b7a-890a-cdf56d9ad57b/pieceshash?cacheHostOrigin=dl.delivery.mp.microsoft.com

 

I hope this helps others!

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