Outlook Desktop Client for Windows, Mac, and Mobile provides the user users with an option to add an “online” meeting link to a scheduled calendar event. By default, this setting will create a Microsoft Teams meeting link for all meetings you schedule.
Turn this option on or off
Open the Outlook Desktop Client.
Select the File menu.
Select Options.
Select Calendar.
Check the box next to
...
Add online meetings to all meetings
...
to enable the setting, or uncheck the box to disable it.
View Microsoft’s Make Every Meeting Online page to change this setting in other Outlook clients and more information about this setting.