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Microsoft is sweeping away CDX environments and reducing limits for Partners

2 Comments

  • Jeff Landeen
    Posted Thursday, 11 September 2025 at 20:28

    It’s even worse now, I haven’t been able to log into the CDX site in the last 3 weeks and keep getting permission errors. Have been told several times that this is due to the site being overloaded, but it absolutely sucks as this was one of the best ways to experiment and build out POC’s for BC extensions or integrations :(

    • Post Author
      Foxer
      Posted Tuesday, 16 September 2025 at 21:28

      That’s right! CDX (recently renamed MDX) is the absolute best way to experiment in a fully functional M365 environment. It’s a key tool in the hands of Partners, so MS shouldn’t limit our access.

      Apart from that, Jeff, if you’re getting the Login Failed error message with the URL like this: https://cdx.transform.microsoft.com/error/407, switching web browser to Microsoft Edge should help. Have you tried it?

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