I'm not sure, but I feel like I'm missing something here, and maybe it's just due to the inconsistency of documentation surrounding WNS (even Microsoft is still showing steps for the old Developer portal.)
I made a developer account for our generic Live account (because MS would not let me use my org account,) and added the Live account to our org's AD, and granted the permissions described in the Partner Center, to allow access.
I then worked with our internal developers to get a dummy MSIX to upload to the MS Store. I've gotten the MSIX through Submission, and have a PSID and PFN. I then logged into a global admin for the org's AD, and setup a secret for the dummy MSIX under App Registrations.
I copy/pasted the PSID, PFN, and secret into the MobiControl Global Settings fields for WNS, but every time I click Save, I get an error "Failed to update the Windows Notification Service configuration because the service failed to obtain a token."
Did I miss a step, or is there more to this that hasn't been documented yet? I'd just like to get WNS working so that we can fully utilize MobiControl on Windows 10+. Any help will be greatly appreciated!