SharePoint Tool to send HTTP request with Host header

[Yoshiro_Fujimori]

Tn the test environment in our POC for Alteryx - SharePoint connection,

the connection request from SharePoint Input Tool (Designer) to M365 server results in authentication failure with a proxy server.

After trials and errors, we see that the authentication fails because the Proxy server for M365 does not accept HTTP request without "Host" header.

(please see attachment for details)

Alteryx Support says that Share Point Tools do not set Host header in HTTP request on any Designer versions,

We use Designer 2022.3.1.430 and SharePoint Tool 2.5.0.
Alteryx Support recreated the same issue on Designer 2024.1.1.93 and SharePoint Tool 2.6.3 for Designer 2024.

and they suggested me to submit an Idea on the community site as an enhancement request.

So I submit this as a new idea:

To enhance SharePoint Tool to send HTTP request with Host header.

(more preferably, to send HTTP 1.1 where Host header is mandatory.)

At the same time, I have questions to the community:

• Have anyone experienced the same error?
• If yes, is there any workaround to connect with M365?

I would like to avoid keep the current security setting as it takes time to change it.

Thank you in advance for your support !