Add Teams to an Existing Meeting
In some circumstances it is useful to upgrade an existing meeting to have Teams functionality. You can easily do this without having to delete the meeting and create a new one.
Only the original creator of the meeting can upgrade it to a teams meeting.
Using the Full version of Outlook
Step 1 - Open the existing meeting in outlook.
Step 2 - Click on the Teams Meeting option in the top bar.
Step 3 - Click Save and Close
Using the web based version of Outlook
Step 1 - Edit the existing meeting in the outlook online calendar. https://outlook.office365.com/calendar/
Step 2 - Click on Add online meeting under the Rooms and Locations and click Teams Meeting
Step 3 - Click Save