Power Automate

Connection Error while trying to connect to Azure Blob Storage Connection with Access Key

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Posted on by RK-11122140-0

Not Sure what Settings i should look at to resolve the issue

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Using connectors

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Michael E. Gernaey 53,362 Super User 2025 Season 2 on at

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Hi @RK-11122140-0

can you please share pictures of your configuration. Please feel free to change values, just make sure that if its a GUID(stilly example) that you put a fake guid and explain what it really represents.

Since it can be many things causing that would have to see it.

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RK-11122140-0 4 on at

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@Michael E. Gernaey While setting Blob connection i selected Authentication as AccessKeys. There are only 2 parametrs needed.

1. Storage account name (copied from Storage account-->access keys-->Storage account name

2. Access keys (Copied from Storage account-->access keys --> Key1/Key2.

This gives me Authentication error. I am assuming there is some restriction on Storage account for connecting.

is this what you are looking for?

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RK-11122140-0 4 on at

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@Michael E. Gernaey i have also selected the following on storage account

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iampranjal 6 on at

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Your Access Key configuration in Power Automate is correct. When this setup fails with an authentication error, the issue is almost always caused by storage account–level restrictions, not the key itself.

Based on your screenshots:

Allow trusted Microsoft services is already enabled — this alone is not sufficient

Power Automate is still being blocked by other networking or security settings

Please verify the following on the Storage Account:

Public network access

Storage Account → Networking

Must be Enabled

For testing, set network access to All networks

If set to Selected networks, Power Automate cannot connect

Private Endpoint

Storage Account → Networking → Private endpoint connections

If any private endpoint exists, Power Automate cannot connect directly using Access Key

Shared Key access

Storage Account → Configuration

Allow storage account key access must be Enabled

If disabled, Access Key authentication will always fail

Connection recreation

After any change, delete the existing Azure Blob Storage connection in Power Automate

Recreate it using:

Storage account name only (not the blob URL)

Key1 or Key2

In short: the authentication error is misleading — the root cause is networking or shared-key access restrictions on the storage account, not incorrect credentials.

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