Microsoft 365 features that help users manage their subscriptions, account settings, and billing information.
Hi Murat,
I understand that you want to know if you can still see the user account list which is created in Windows Live Admin Center when migrating from Windows Live to Office 365.
Generally, we can import mailbox items from others mail server to Office 365. But, just as you said, you are unable to access to the Windows Live Admin Center now which means that you cannot export these items from Windows Live. So I suggest you go to theWindows Live Forumfor further assistance since our forum mainly focuses on Office 365 Online services.
Thanks for your understanding.
Rick