Here is a short video shows the complete procedure from Adding the external contact in Active Directory, Assign Teams permission, Add to Teams, Add the contact as an attendee in a meeting. Hope, the video will help you out

Manu Philip

• Microsoft Certified: Azure Solutions Architect Expert
• Microsoft Certified Azure Administrator Associate
• Microsoft 365 Certified: Messaging Administrator Associate
• MCSA, Microsoft Windows Server
• MCITP, Exchange Server
• ITIL V3 Certified