Enable CDN in your Office 365 tenant
https://support.office.com/en-us/article/use-the-office-365-content-delivery-network-with-sharepoint-online-bebb285f-1d54-4f79-90a5-94985afc6af8 Connect-SPOService -Url https:// contoso-admin .sharepoint.com Get-SPOTenantCdnEnabled -CdnType Public Get-SPOTenantCdnOrigins -CdnType Public Get-SPOTenantCdnPolicies -CdnType Public Set CDN Public Set-SPOTenantCdnEnabled -CdnType Public Get-SPOTenantCdnOrigins -CdnType Public Set CDN Private Set-SPOTenantCdnEnabled -CdnType Private Get-SPOTenantCdnOrigins -CdnType Private Set both CND Private and Public Set-SPOTenantCdnEnabled -CdnType Both -Enable $true To change the list of file types to include in the Office 365 CDN Get-SPOTenantCdnPolicies -CdnType <Public | Private> Set-SPOTenantCdnPolicy -CdnType <Public | Private> -PolicyType IncludeFileExtensions -PolicyValue "< Comma-separated list of file types >" To add an origin for your assets Add-SPOTenantCdnOrigin -CdnType ...