Microsoft has set Teams meeting as the default for all meetings. This can cause issues if you are looking to setup in-person meetings or you are adding a webex call to a meeting
Web Client
Open Settings and search for "Events you create"
Uncheck the Add online meeting to all meetings box
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Click Save in the lower right corner
Outlook Desktop
Click on File and Select Options
Click on the Calendar Tab and uncheck the Add online meeting to all meetings option
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Click OK
After this your meetings will require you to toggle a Teams meeting