title: Understanding Multi-Tenancy in Azure Active Directory (AD)
body: <p>Here is a summary of what I'm trying to accomplish.</p>
  <p>I have a regular Azure AD (not B2C) tenant... let's call it Hybrid.  I want to let non-Corpo users sign up/register accounts in that tenant by entering their name, email, company, etc.</p>
  <p>I also want to let users in one other organization/tenant (call it Corpo) sign into Hybrid's tenant applications &amp; show up as either a guest or external user in the Hybrid tenant, so I can manage their groups specifically within the Hybrid tenant.</p>
  <p>I'm not doing a B2C tenant for this because it doesn't seem to adequately support app roles &amp; I'm trying to accomplish setting up roles &amp; permissions for all users in the Hybrid tenant.</p>
  <p>Is this even doable without a B2C tenant?  I've figured out one way to let a Corpo user sign into a Hybrid-tenant app, but that user account doesn't show up in the users list then.</p>