Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
Hello,
Can you tell me, how did you create a Teams meeting exactly?
Did you create it from your Teams app's calendar tab? If you do, the link should be generated automatically, but it will not be sent from your yahoo.com address, because Yahoo is not native to Microsoft. Teams app has no way to access your Yahoo's email function to send it, instead it will be sent via a placeholder outlook.com email address. Attendees cannot reply to this email, but they will get the email with meeting link to attend.
If you want to send the meeting via yahoo, you can create the meeting in Teams app > Calendar tab, invite yourself, then go to your yahoo email to get the invitation email, then forward it to your friends.
Please know, these are done in Teams app. You cannot do this in Outlook app. Outlook Classic app doesn't support Teams add in for personal account. New Outlook app has the Teams toggle, but it only works if your Microsoft account has a native Microsoft domain, such as outlook.com or hotmail.com.