Hi,
- The wording seems to be a issue with the understanding however it is very simple pricing structure, In your Azure AD tenant, guest user collaboration usage is billed based on the count of unique guest users with authentication activity within a calendar month.
- When your tenant is linked to a subscription and you use External Identities features to collaborate with guest users, you'll be automatically billed using the MAU-based billing model.
So any number of users under 50000 is free and above that it will be charged as per below:
[https://learn.microsoft.com/en-us/azure/active-directory/external-identities/external-identities-pricing
Hope this helps.
JS
==
Please Accept the answer if the information helped you. This will help us and others in the community as well.