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Power Apps - Connector Development
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PowerApps Custom Connector Integration Issues: CORS in Test Mode and Studio Mode

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We encountered issues while integrating PowerApps with a Custom Connector in both Test Mode and Studio Mode. Initially, we faced CORS problems while testing the custom connector response and when accessing the same API through the published APP URL.

To resolve these CORS issues, we referred to a couple of articles and successfully addressed the problem by adding the following URIs to the CORS policy:

  • https://flow.microsoft.com
  • https://apps.powerapps.com

    After implementing the CORS policy changes it worked for almost 2 years without any issues. However, the custom connector stopped working in Test mode recently, although it still functions correctly within the app. Do we have any updates from MSFT w.r.t this?

    Additionally, we continue to face challenges in loading data in PowerApps Studio mode. We attempted to resolve this by adding several URLs to the CORS policy based on our network tab debugging, but unfortunately, none of them have worked so far. Some of the URLs we tried are as follows:

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