Why is every meeting being created as a Teams meeting?

When you click the ‘Invite Attendees’ button may automatically create a Teams meeting. If you are wanting to meet in person rather than via Teams:

ONE MEETING:

1. Click the ‘Don’t Host Online’ button.

ALL MEETINGS:

1. Click File.
2. Click Options.
3. Click Calendar.
4. Untick the ‘Add online meeting to all meetings’ option.