Symptom
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You cannot set the default chat app to Skype for Business in Microsoft Outlook for Mac because the default value is set to another app (for example, Microsoft Teams).
Workaround
To work around this issue, follow these steps:
- Navigate to the following location:
~Library/Preferences/com.apple.LaunchServices/com.apple.launchservices.secure.plist. - Locate the LSHandlerURLScheme sip under the Root/LSHandlers/Item array and verify that LSHandlerRoleAll refers to an app other than com.microsoft.skypeforbusiness.
- Change LSHandlerRoleAll to com.microsoft.skypeforbusiness.
- Restart the computer.
- In Outlook, hover the cursor over the contact, and then select the IM button to verify that the Skype for Business app starts.
Alternatively, you may be able to use Workgroup Manager by getting support from Apple to avoid configuring LSHandlerRoleAll on a per-user basis. For more information, see the Client Management documentation in the Mac OS X Server area of the Apple website (www.apple.com/server).
Status
Microsoft is researching this problem and will post more information in this article when the information becomes available.
More information
Microsoft Outlook For Mac 2016 Help
For detailed information about how to manage preferences by using Workgroup Manager, see the Mac OS X Server User Management documentation.
Download Microsoft Outlook For Mac
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