Power Platform Community Forum Thread Details

Could you please show a bit more about your Excel table?

Faurther, do you create a record in Opportunities object of Salesforce?

I think there is something wrong with the formula that you provided within Condition box. The formula that you provided is only supported in PowerApps ranther than Microsoft Flow. More details about expression supported in Microsoft Flow, please check the following article:

WDL expression in Microsoft Flow

In addition, I think you have a misunderstanding in usage of the "Get row" action of Excel connector. The "Get row" action of Excel connector is used to retrieve a single row from an Excel table, the Row id field of this action is required to fill a Unique identifier of a row in your Excel table ranther than the unique identifier of a record in your Salesforce object.

I assume that you created a record in Opportunity object of Salesforce, I have created a Excel table on my side and the data structure of it as below:

Note: The Opportunity ID column is used to store the unique identifier of a record in Opportunity Object.

I have made a test on my side and please take a try with the following workaround:

Add a "When a record is created" trigger, specify Object type.
Add a "Get rows" action, specify File Name and Table Name.
Add a "Filter array" action, From set to output of "Get rows" action, Within Condition box, left input box set to Opportunity ID dynamic content (Decorated as Opportunity_x0020_ID within Dynamic Content tab) of "Get rows" action, right input box set to Opportunity ID dynamic content of the trigger. Within middle drop down, choose is equal to.

Note: If you want to check if there is a record with same Opportunity Name (or other properties) has been existed in your Excel table, within above Condition box, left input box set to Opportunity Name (or other properties) dynamic content.