SharePoint Input Tool with Service Principal - Strange behavior when using custom domain

[Chronos]

Hey there,

I'm currently trying to get the SharePoint Input Tool (version 2.7.3) to work with a Service Principal (SP) for my company.

I have already conducted numerous tests using a non-production SP for a SharePoint site that I created specifically for testing purposes (e.g. XXX.sharepoint.com), and everything worked flawlessly.

However, after extending it to a production SharePoint with a different link structure/tenant (resources.mycompanyname.com), the tool stopped working.

I also noticed that the preview within the tool itself was bugged when I used a link (as described like here SharePoint Tools version 2.6.0 and above: Using Service Principal will not load Sites) that didn't contain the word "SharePoint". Please see the images below for reference.

(Using a SharePoint link with the XXX.sharepoint.com format works as intended.)

(Using a SharePoint link with a different domain format, such as "resources.mycompanyname.com" that does not contain the word "sharepoint", results in an incorrect URL and a buggy string after the search bar.)

The production SP has the same permissions and configurations as the non-production testing SP, and it has access to the relevant SharePoint, which I validated using a Python script by downloading and reading files from there through the same production SP.

I can read files from the production SharePoint site when I sign in as a user in the tool and select the sites and libraries myself. I only have this issue when using the SP within Alteryx.

I hope someone else has also experienced this and found a solution. I searched the forum and the internet, but unfortunately I couldn't find anything similar to my case.

Could this be due to the custom domain we are using, or is it a restriction of the tool?

Thank you for your help, and best regards!