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Power Automate
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HTTP Pfx

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I am attempting to create a custom API connection that requires a certificate. 

 

I converted the PFX to a Base64 text file. I then put the base64() formula into the Pfx section. However, no matter what I do the system acts as though the PFX isn't inputted and is "blank." 

 

Rex2025_0-1693941761948.png

 

I have attempted putting base64("actual content of pfx (all 10k letters)) and that doesn't work. Nothing seems to work. 

 

The file is not password protected. 

 

This appears on the side of my screen when I attempt to run the flow: 

 

Rex2025_1-1693941812504.png

 

No matter what I input in here the system still doesn't work, stating that:

 

Rex2025_2-1693941860777.png

 

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  • shawnwang Profile Picture
    Microsoft Employee on at

    Just got this work and it is actually pretty much the same as using Client Secret. 

     

    Step 1. add a Azure Key Vault step - Get Secret - enter the Certificate Name as the customer value here. 

    Yes. the Name of the secret == Certificate Name.

    shawnwang_0-1716315377738.png

     

    Step 2. in your HTTP step, 

    - Credential Type: Certificate

    - PFX: Value of the secret from above step

    - Password: 

     

    base64('')

     

     

    shawnwang_1-1716315442458.png

     

    Done! and it works!

    shawnwang_2-1716315561999.png

     

    Please make this as the solution if your test succeeds.

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