Cross-Cloud AAD B2B Public Preview

Public Preview for cross-cloud B2B collaboration is now available.  This will enable guest users can access your resources (such as LOB/SaaS apps), SharePoint sites, and OneDrive files.  

Reference: https://techcommunity.microsoft.com/t5/security-compliance-and-identity/build-2022-new-frontier-of-collaboration-with-external/ba-p/3407091