How to change default setting to "reply" in Outlook

To change default from Reply All to simply Reply:

1. Open your Outlook Web client
2. Click the Settings Gear in the upper-right.
3. Type "reply" in the search field then select the "Reply Options" option
4. In the middle pane click on the radio button for make my default response "reply" and save
5. That's it.  You are good to reply instead of reply all now!