I believe this can be accomplished with a Configuration Profile.
Application & Customer Settings > External Applications > com.microsoft.Outlook > Disable Skype for Business meeting support > True.
This uses the same DisableSkypeMeeting key.
I don't remember when it was added but maybe 10.25.2 of JAMF.
Computers > Configuration Profile > New > Application and Custom Setttings > External Applications > Add > Choose a source > Jamf Repository > com.microsoft.Outlook
Preference Domain Properties > Disable Skype for Business meeting support