I’m currently working with only one production Quick Sight account so I can’t convert to SSO and start using namespaces yet. But I have a question related to namespaces:
If user within a namespace has right to invite new user to quicksight, in which namespace is the new user created into? Does it go to Default or the same namespace than the user who invited new user?
Custom namespaces are only accessible through federated single sign on users. Hence for your question, if an invitation is sent to register for Amazon Quick Sight, the user is created in a default namespace .
( Supporting multitenancy with isolated namespaces - Amazon QuickSight )