Removed the description of the private CDN #4241
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Based on my understanding, the configuration of a Private CDN for SharePoint Online (Office 365 CDN) has not been supported since the release of MC504326 in 2023.
MC504326 Configuration of Private CDN is no longer required for SharePoint Online.
However, the current tutorial for configuring an organization assets library still includes references to Private CDN, which may lead to unsupported configurations. To prevent potential misconfigurations, I suggest removing all mentions of Private CDN and explicitly requiring the -CdnType parameter to be set to Public.
If Private CDN is still exceptionally supported for organization assets libraries, a clear note should be added to distinguish this from other features where Private CDN is deprecated.
For reference, the documentation for Add-SPOOrgAssetsLibrary indicates that Private CDN support is deprecated.
https://learn.microsoft.com/en-us/powershell/module/sharepoint-online/add-spoorgassetslibrary?view=sharepoint-ps#parameters
Additionally, one of the most frequently cited articles on Office 365 CDN removed all references to Private CDN as of April 19, 2024.

https://learn.microsoft.com/en-us/microsoft-365/enterprise/office-365-cdn-quickstart?view=o365-worldwide#cdn-overview
This is commit history for the above. In the past, it was clearly stated that both Public and Private CDNs were supported, but now the mention of Private CDNs has been removed.

MicrosoftDocs/microsoft-365-docs@44bd133