In the AZ-900 course (chapter 8 – "AAD") it says:
"One User – One Tenant – each user in Azure can only belong to a single tenant. Users can be guests of other tenants though"
However, in the quiz, that is connected to this chapter, there is a question about this:
"How many tenants can a single user belong to in Azure Active Directory?"
And the correct answer is "500".
Also, the official MS Azure doc says that a single user can belong to a maximum of 500 Azure AD tenants as a member or a guest.
Would be good to correct this chapter (of course if my understanding is correct :)).
You are absolutely correct, and we are in the middle of fixing the mistake in this chapter. Thanks for letting me know and for your keen eye 😊