Microsoft 365 features that help users manage their subscriptions, account settings, and billing information.
Contacted support and until the issue is fixed, the work around is for the invited family members sign out then sign in with the main user id. You can do this under File - Account in one of the apps, such as Outlook. Then switch account to the one you normally use (sub account). He said to keep the Service Status page up, and when the problem is fixed, sign out of the main account and you should automatically be switched back to your sub account.