How to connect Power Apps to Azure Blob using Service Principal Authentication

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Posted on by FR-27081326-0

Hi all!

I need to connect to Azure Blob through Power Apps. The connector I used before with the Access Key is not suitable because it requires the endpoint to be public. How can I connect using a Service Principal Authentication?

Thanks

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Power Apps Pro Dev & ISV

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stampcoin 5,058 Super User 2025 Season 2 on at

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@FR-27081326-0 Hi,

Please check those article, it will lead you to do so.

Creating a service principal application using API

Connect to Azure Blob Storage from Power Apps

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FR-27081326-0 69 on at

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Hi @stampcoin, thanks for your answer!

So, there's no direct connector to connect Power Apps with Blob using a Service Principal or another more secure connection instead of an Access Key?

Thanks

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stampcoin 5,058 Super User 2025 Season 2 on at

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@FR-27081326-0 Hi,

You can use Azure Blob Storage connector directly in the app, the default is what you described ( service principal authentication) with below img shows.

https://learn.microsoft.com/en-us/connectors/azureblob/

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FR-27081326-0 69 on at

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Hi @stampcoin !

The documentation says that if you want to use a Service Principal to access Blob Storage from Power Apps, the standard connector is not suitable. Therefore, it recommends creating an API and a custom connector to call it from Power Apps. I wanted to know if there is another solution.

Thanks

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stampcoin 5,058 Super User 2025 Season 2 on at

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@FR-27081326-0 Hi,

Not sure if we are talking about the same thing, or I misunderstood you.

below is the from the article.

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FR-27081326-0 69 on at

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Hi @stampcoin !

From what I understand, there are some limitations when using a Service Principal, including the fact that the connection cannot be shared.

Thanks

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stampcoin 5,058 Super User 2025 Season 2 on at

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@FR-27081326-0 Hi,

Those out of box ones, you either pay the license fee, or pay the certification fee.

otherwise you can build your custom connector for internal use, that is other type cost.

You have to balance the business needs and the cost.

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FR-27081326-0 69 on at

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Hi @stampcoin !

Which license and certification are you referring to?

Thanks

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stampcoin 5,058 Super User 2025 Season 2 on at

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@FR-27081326-0 Hi,

I meant the Azure blob connector authentication types.

Creating a connection

for example certOauth, you may consider buying certification for your PROD.

if you still want to use this connector with service principal authentication, since it is a Premium type, so this is the licenses I referred.

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FR-27081326-0 69 on at

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Hi @stampcoin !

I already have a Premium license for Power Apps and Power Automate, but I still can't use authentication with a Service Principal. When I create and use it in a flow, I get an authentication error.

Thanks

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