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Power Platform Community / Forums / Power Automate / Won't show table colum...
Power Automate
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Won't show table columns in "add a row into a table" Excel action

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Posted on by 11
I'm trying to create a flow that pulls text strings out of my email and adds them to a table row in Excel. I've created the Condition no problem and composed the JSON output no problem.
 
However, when creating the "Add a row into a table" Excel action, I select the Location where my file is (OneDrive), I've selected the file, and it sees the defined table name in my Excel file just like I expected. However, when I select the table name, I believe it's supposed to show me the headers in my table so I can map the elements in my JSON file to the columns in my Excel file. But it doesn't show me any columns. I've asked Copilot to give me specific instructions how to map it and it keeps referring to columns that should show but they don't show. The AI support is clear--it tells me to make sure my Excel file is closed (which it is) and make sure my table is named (which it is), and make sure the source file is closed (which it is), and to delete the Action and re-add it to make sure it's seeing the latest file (which I've done multiple times). Still no columns. See screenshots.
 
What am I missing?!?
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  • Verified answer
    stampcoin Profile Picture
    5,158 Super User 2026 Season 1 on at
    Have you selected the Advanced parameters. ?
    Columns should be there.
     
    For example below img from my flow. It gives me Table1's 3 columns
  • Verified answer
    DS-25071828-0 Profile Picture
    11 on at
    Thank you. I do see those! I didn't know those were the fields I select to map though. When I asked Copilot what the "advance parameters" were for, it said I only needed them for additional fields I didn't want to map so I ignored this section. 
     
    So from your post, I then did select them and each showed me a field. Copilot instructed me to use the "/" (dynamic content) (and NOT an expression) to "select the appropriate value from the Compose action." But all I saw under Compose was "Output". When I told Copilot I only saw "Output" to select, it then said "that's expected!" and then to "insert an expression"--outputs('Compose')?['FIELDNAME'] to actually map it to my Excel field.
     
    See attached screenshot.
     
    Confusing, but I think I figured it out. Thanks for pointing me down the correct path!
    pic4.png
  • stampcoin Profile Picture
    5,158 Super User 2026 Season 1 on at
    Great, Please mark it as answer.
    Feel free to post if you still have problem about this.

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