How do I set Outlook as my default email application?

Windows 10

1. Click on Start

2. In the search box, type in "Default apps" without the quotes

3. Click Default apps
   

4. Under Email, click the current application (e.g. Mail)
   

5. Select Outlook
   

6. Close the settings window

Windows 7

1. Open Outlook
2. On the File tab, choose Options > General
3. Under Start up options, select the "Make Outlook the default program for E-mail, Contacts, and Calendar" check box
4. Click OK

macOS

1. Run the Mail application
2. On the Mail menu, click Preferences
3. Click the General tab
4. For "Default email reader", select Microsoft Outlook