HTTP REST API - Post/Put results with "The requested URL was rejected. Please consult with your administrator."

[Dänu]

Hey everyone

I got this strange issue. I have setup a process in which I call an API with POST to create a new user account. This worked for 2-3 months perfectly. But now, since last week I always receive the body: "The requested URL was rejected. Please consult with your administrator." And the server does not even log these events. The GET calls do work though, which surprises me.

I've tested the same with postman.co and there it worked flawlessly. Thus I presume there is some issue with Microsoft Flow. But I cannot find out what it is. Has anyone an idea?

{

    "inputs": {

        "method": "POST",

        "uri": "https://censored/admin/users/",

        "headers": {

            "Content-Type": "application/json; charset=utf-8",

            "Accept": "application/json"

        },

        "body": {

            "user": {

                "group": "censored",

                "email": "censored",

                "name": "censored",

                "send_password_request": true

            }

        },

        "authentication": {

            "type": "Basic",

            "username": "censored",

            "password": "censored"

        }

    }

}

And this worked before last week. So I really don't know what happened...

Any help is appreciated. Cheers

[alrez]

Hi,

Its definitely weird that its not currently working. Looking through it, it looks like it should be working. This is probably going to require some more in depth troubleshooting of the network calls. I would suggest using your developer tab for your browser to see if that returns any relevant data on why it might be failing. If you are still having issues from there and cant figure out what is going on I would suggest opening a ticket with Microsoft Support. I'll include a link below if you would like to go down that path. Otherwise if any other communities users have any ideas feel free to chime in.

If you would like to create a ticket with Microsoft Customer Support here is a link on how to do so: https://docs.microsoft.com/en-us/power-platform/admin/get-help-support

Regards,

Alex

-------

Community Support Team _ Alex Rezac
If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.

[Dänu · Accepted solution]

Hey Alex

Thank you very much for your help. Luckily I found the cause of this whole debacle. The firewall of the web application was blocking my calls. The reason was that the header was too long and thus the firewall blocked it. We've increased now this limit. 

Maybe it would still make sense for you, to keep an eye on the header length. And try to keep it as short as possible.

Thanks again with best regards