Thank you for posting your query. From the above description I could understand that you are looking to create a B2C user change notification subscription.
Please do correct me if this is not the case by responding in the comments section.
- I was able to test this as well and got error
I did registered my application in B2C tenant itself and got the above error, though checking in the sign in logs show my app access was successful.
- On going through the Supported resources
documentation I came to know that Users change notification is not supported for personal accounts and B2C tenants.
- Based upon the research I would say that this is expected behavior. Request you to use this only for AAD corp user accounts.
- However if this is impacting you business needs then I would suggest to raise this as a feature request on our feedback portal.
Thanks,
Akshay Kaushik
Please "Accept the answer" (Yes), and share your feedback if the suggestion answers you’re your query. This will help us and others in the community as well.