Using Configuration Profile (Preferred)

1. 
   

   Create a Configuration Profile in Jamf Pro:

   
   
   
   
   • 
     

     Navigate to Computers > Configuration Profiles

     
     
   
   
   • 
     

     Click "+ New" to create a new profile

     
     
   
   
   
   


2. 
   

   Configure Microsoft 365 Settings:

   
   
   
   
   • 
     

     For the payload type, select "Microsoft 365"

     
     
   
   
   • 
     

     Add the following key/value pair:

     
     
     
     
     • 
       

       Key: DefaultOnlineMeetingProvider

       
       
     
     
     • 
       

       Value: Zoom (exactly as written, case-sensitive)

       
       
     
     
     
     
   
   
   
   


3. 
   

   Scope the Profile:

   
   
   
   
   • 
     

     Assign the profile to the appropriate computers or groups

     
     
   
   
   • 
     

     Set the distribution method (typically "Install Automatically")

     
     
   
   
   
   

or below script

#!/bin/bash

# Path to Outlook preferences
plist_path="/Library/Containers/com.microsoft.Outlook/Data/Library/Preferences/com.microsoft.Outlook.plist"

# Set Zoom as default meeting provider
defaults write "$plist_path" DefaultOnlineMeetingProvider -string "Zoom"

# Set permissions
chmod 644 "$plist_path"
chown root:wheel "$plist_path"

But I did not test this. Should work. Just a word of caution!!!

@Nandagopal thank you for your response, I can't locate a payload for M365 unfortunately and the script (something similar I've tried) has also failed. 

Let me  test and keep you posted

I haven't tested this but you could try this in a profile using the Application & Custom Settings payload - Upload. Use "com.microsoft.Outlook" for the preference domain. You don't need to actually upload a PLIST. You can just paste this in: 

This is not a setting we manage at my company, but we do manage some settings for Outlook. We use a custom PLIST like the one above to automatically login the user's account and enforce using the "new" Outlook.