Can we change the default calling app

[rickwhois]

Looking to change from Facetime to Teams via script or config. Is this possible in Jamf or script?

[Phil_James]

Same here, anyone have a clue?

I've tried to catch what files get modified with Composer, but unable to track down the .plist or setting.

[tboothman]

Have we made any progress here? 

[squeisser]

Even it is an old question but still actual:

Yesterday a customer asks the same so we did researching.

We use RCDefault App (Pref Pane) and Composer to track the changes and discovered that the change was made in path ~/Library/Preferences/com.apple.launchservices in file com.apple.launchservices.secure.plist

Basicly the change you need to implement is that macOS must use for " tel " the application MS Teams instead of Facetime. The file is binary encoded.

<dict>
  <key>LSHandlerPreferredVersions</key>
  <dict>
    <key>LSHandlerRoleAll</key>
    <string>-</string>
  </dict>
  <key>LSHandlerRoleAll</key>
  <string>com.microsoft.teams</string>
  <key>LSHandlerURLScheme</key>
  <string>tel</string>
</dict>

 We are looking for an easy way to implement then to edit the file by hand.

[RainerNRW]

Hello everyone,
Please excuse my English.

The script method with the RCDefault app is the easiest in my opinion. Put the "swda" app in a working folder on the disk and then run it via postinstall

"Working folder/swda - setHandler --app default.app --URL tel"

. You can download the SWDA app here https://github.com/Lord-Kamina/SwiftDefaultApps.