I am trying to use the Out of the box SharePoint Connected System and using Authorization Code , i assume Appian connected system is taking care of the connection request to /authorize based on the client and tenant id provided. Upon entering the details when i try to authorize i keep getting error message "AADSTS9002325: Proof Key for Code Exchange is required for cross-origin authorization code redemption." Has anyone come across this or has any idea where to look for possible clues?
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I was able to resolve this , there was issue with cross domain tenancy had to add user as a guest to the tenant list.