No, it is not possible to save or run Power Automate flows without access to Microsoft cloud services.
Even if your internet works, Power Automate is 100% cloud‑hosted and requires connectivity to Microsoft endpoints.
This is the only supported approach if you want to use Power Automate.
Allow outbound access to:
*.powerautomate.microsoft.com
*.powerplatform.microsoft.com
*.azureedge.net
login.microsoftonline.com
Region-specific Dataverse endpoints
This does not mean “open internet”—it is controlled allow-listing and this is the standard approach used in highly regulated enterprises.
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