I’m using native app latest version 6.0.10 and getting 401 - Unauthorized: Access is denied due to invalid credentials while trying to test our WebAPI endpoints hosted in an IIS 7.5 server. For Authorization type, I have selected NTLM Authentication and supplied the Windows username and password.
Is the NTLM Authentication broken in version 6.0.10? If so how can I install a lower version that supports it?
Can you share the response headers from postman-console?
Here’s the response headers, thanks for looking:
Response Headers:
content-type:“text/html”
server:“Microsoft-IIS/8.5”
www-authenticate:
0:“Negotiate”
1:“NTLM”
x-powered-by:“ASP.NET”
date:“Thu, 26 Apr 2018 19:40:17 GMT”
content-length:“1293”
That seems to be alright. I tested on an IIS server which is sending the exact same header and it’s working for me.
Can you try the same credentials by opening the URL in a browser window? Does that work?
Also, if possible share following information (either here or mail us at help@getpostman.com):
The same URL works on a browser window and it downloads the API response as a JSON file.
There are 3 requests that goes out in the Postman console (attached).
Also attached are the RAW log of each of the 3 requests.
Did this issue ever get resolved? I’m having similar NTLM issues but it seems these threads usually go dead without solution. Any info you can provide would be most helpful.
I am having the same issue with a much newer version of Postman.
Version 7.26.1
win32 10.0.18363 / x64
My request works fine in the browser (Edge + Chrome) and works without issue in Insomnia. I don’t really want to switch to Insomnia but at least it seems to be working using that tool.
