There are a couple ways to turn off auto ADD Teams Meeting: 1) a setting in Outlook on the Web and 2) a setting in your Outlook application on your computer.
Recommended for ALL Outlook Users (in Office.com):
1. Log in and click on Settings (the gear icon).
2. In the Calendar tab > Events and Invitations > uncheck the 'Add online meeting to all meetings."
For PC Users (in Outlook Application):
1. Click Outlook in the menu tool bar then Preferences.
2. In the Calendar section, uncheck the 'Add online meeting to all meetings" then click OK.
For MAC Users (in Outlook Application):
1. Click Outlook then Preferences in the menu.
2. In the Calendar section, click on 'Add online meeting to all events:' Configure button.
3. In the
'Online Meeting' window, be sure to
uncheck the box "Add online meeting to all meetings" then click
Save.Conversely, if you'd like to auto ADD Teams or Zoom meetings, check the box and select your meeting software preference.