I am facing an interesting issue in giving access to the partner users for our site in SharePoint Online. Sharing site to external users by sending invitations is the solution. But, when we talk about 10000 people I don't think this scales better as the managing of the invitations/permissions is a big mess. (For managing 1000 users we faced hell lot of issues, can't imagine for 10000 users). Anyone has any ideas on any other workarounds in Office 365/SharePoint Online?
The goal is we have 200K documents, videos in our SharePoint online site. Now, we have big echo system where multiple partners should get access to these documents and videos seamlessly with no issues (Read only). Using external sharing and managing is not possible for 10000 users (in future the count will grow).
Is there any way we can create one more Azure AD and add all these external users there and link that to the existing SharePoint online site? (It is like create new AD in on-premises SharePoint and extend web application and give extra-net zone to use the new AD. So both intranet and extranet should work). Please throw some ideas.