@Loren Rana da Silva Oliveira - Thanks for the question and using MS Q&A platform.
The error message you provided indicates that there was an error during an On-Premise Gateway related activity and that the OLE DB connection failed to be established.
This error can occur if there is an issue with the gateway configuration or if there is a network connectivity issue. Here are a few things you can try to troubleshoot this issue:
Check the gateway configuration: You mentioned that the gateway configuration has already been done, but it's still worth checking to ensure that the gateway is configured correctly. You can check the gateway configuration by using the On-Premises Data Gateway management portal.
Check the network connectivity: It's possible that the issue is related to network connectivity. You may want to check if there are any network issues that may be causing the connection to fail.
Check the firewall settings: You may want to check the firewall settings to ensure that the necessary ports are open for the gateway to communicate with the Azure Analysis Services model.
Try using a different gateway: If the issue persists, you may want to try using a different gateway to see if that helps.
If none of the above steps help, you may open a support ticket for further assistance in troubleshooting this issue.
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