Can anyone confirm whether the ADFS redirect parameter "estsredirect" to O365 is encrypted?


  • When you are federated with O365 and access a specific service by going to for example you are first redirected to ADFS and when authenticated you are sent back to your original URL. This value seems to live in a paramter called "estsredirect". However there is no information on how this value is encoded or whether Microsoft encrypts it. I have tried Base64 decoders but it shows nothing meaningful. Can anyone, perhaps from Microsoft, confirm this?

    The only thing I can find about it is this thread which seems to indicate that it's Base64 encoded which does not seem to be the case anymore:

    • Edited by Najib br Thursday, October 26, 2017 8:44 PM
    Thursday, October 26, 2017 8:42 PM

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