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Running some applications may depend on downstream services such as:
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graph.microsoft.com: to check if a tenant has access rights to the application
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graph.windows.net: to get user regional information so the application can offer the most relevant educational resource from user’s region.
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musicart.xboxlive.com: to get the thumbnail and preview images of all
To help end users, a school IT Admin may want to configure their school firewall policy. Use these trusted URLs and IP addresses ranges for optimization.
*.sharepointonline.com
*.microsoftonline.com
*.microsoft.com
*.microsoftonline-p.com
graph.windows.net
*.office.com
*.xboxlive.com
For additional URLs and IP addresses, please refer to the list specific to O365.