Setup: Enabled guest access in Teams Admin Center; invited external@hotmail.com and external@gmail.com to teams/meetings. Issues: Gmail user needed Microsoft account creation; Hotmail user had empty “My Apps” (normal for guests). Fixes: Guided sign-in, granted SharePoint “Can edit” for file access. Admin: Managed teams/channels, assigned meeting policies, used Entra ID for guest roles. Key Takeaway: Guests…