topic AzureBlobs failed to get the response: 'The underlying connection was closed: Could not establish in Report Server

AzureBlobs failed to get the response: 'The underlying connection was closed: Could not establish

TorresJA — Fri, 13 Jun 2025 15:39:14 GMT

HI everyone:

I hope you are doing well. I have installed and configured the On-premises data gateway, but whenever I try to refresh any Dataflow, the status shows as failed. I checked the logs and found the following message:
Non-gateway exception encountered in activity scope: Microsoft.Data.Mashup.MashupValueException (0x80004005): AzureBlobs failed to get the response: 'The underlying connection was closed: Could not establish trust relationship for the SSL/TLS secure channel.'.

Could you help me please?

Re: AzureBlobs failed to get the response: 'The underlying connection was closed: Could not establish

Nasif_Azam — Fri, 13 Jun 2025 17:01:56 GMT

Hey TorresJA ,

The error message typically indicates a certificate trust issue between your on-premises data gateway and Azure services like Azure Blob Storage. It occurs may:

Invalid or Untrusted Root Certificates
Outdated TLS Version Support
Interception by Antivirus/Firewall
Missing Gateway Configuration or Mismatch

Solutions

1. Check the SSL/TLS Certificate Trust Chain

Open a browser on the gateway machine.
Go to the Blob Storage URL you're trying to connect to (e.g., https://<yourstorageaccount>.blob.core.windows.net).
See if it loads without certificate errors.
If it doesn’t, install the missing intermediate/root certificates.

2. Force TLS 1.2 Support (Windows Registry)

Make sure your OS is using TLS 1.2 by default:

Open regedit and navigate to: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\.NETFramework\v4.0.30319

Add or update these DWORD values:

SchUseStrongCrypto = 1
SystemDefaultTlsVersions = 1

Repeat the same under: HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\.NETFramework\v4.0.30319
Then reboot your system.

3. Update Gateway and OS

Make sure you’re running the latest version of the On-premises Data Gateway.
Update Windows, especially the root certificate store.
If possible, update to the latest .NET Framework runtime.

Verify Dataflow Gateway Usage

In the Power BI Service:

Go to the workspace where your Dataflow is.
Edit the Dataflow → Check the data source settings.
Ensure the gateway is mapped correctly to the source.

If you found this solution helpful, please consider accepting it and giving it a kudos (Like) it’s greatly appreciated and helps others find the solution more easily.

Best Regards,
Nasif Azam

Re: AzureBlobs failed to get the response: 'The underlying connection was closed: Could not establish

Anonymous — Mon, 16 Jun 2025 11:19:28 GMT

Hi TorresJA ,

Thank you for reaching out to the Microsoft Fabric Community

As highlighted by Nasif_Azam , the issue is likely due to a certificate trust or TLS configuration problem on the gateway machine. Please verify SSL certificate trust, enforce TLS 1.2 via registry, and ensure your gateway is up to date and correctly mapped in the Dataflow settings.

For more details, you can also refer to this doc: Install an on-premises data gateway | Microsoft Learn

Hope this helps. Please reach out for further assistance.

If this post helps, then please consider to Accept as the solution to help the other members find it more quickly and a kudos would be appreciated.

Thank you.

Re: AzureBlobs failed to get the response: 'The underlying connection was closed: Could not establish

Anonymous — Thu, 19 Jun 2025 04:37:30 GMT

Hi TorresJA ,

I wanted to check if you had the opportunity to review the information provided. Please feel free to contact us if you have any further questions. If my response has addressed your query, please accept it as a solution and give a 'Kudos' so other members can easily find it.

Thank you.

Re: AzureBlobs failed to get the response: 'The underlying connection was closed: Could not establish

Anonymous — Sun, 22 Jun 2025 05:13:25 GMT

Hi @TorresJA ,

I wanted to check if you had the opportunity to review the information provided. Please feel free to contact us if you have any further questions. If my response has addressed your query, please accept it as a solution and give a 'Kudos' so other members can easily find it.

Thank you.

Re: AzureBlobs failed to get the response: 'The underlying connection was closed: Could not establish

Anonymous — Wed, 25 Jun 2025 04:09:57 GMT

Hi TorresJA ,

May I ask if you have resolved this issue? If so, please mark the helpful reply and accept it as the solution. This will be helpful for other community members who have similar problems to solve it faster.

Thank you.