90009 error with Get-MSIntuneAuthToken Module

[ACEContorno]

Hello all,

I'm currently ramping up for our new IPU sequence and working through testing with our CMG. When trying to get the script working, it keeps getting to a failure when trying to pull a token. I was able to track down the sign-in logs to find the following error in AzureAD:

Application '{appId}'({appName}) is requesting a token for itself. This scenario is supported only if resource is specified using the GUID based App Identifier.

I have all of the variables set as recommended, including using a custom MDMApplicationIDURI (our Desktop Analytics registration took the default https://ConfigMgrService). This was not set in our last IPU project as we had not enabled Desktop Analytics at that point.

I'm struggling to resolve the above failure though, which I believe will allow the rest of the script to work. Any help/guidance is appreciated.