Hi @Peter Kim ,
Thanks for your patience.
- For the above scenario, suggested approach would be to use VNet Injection as per documentation which will create VNet and NSGs in your subscription and can be used for making the changes
- Managed resource group in databricks subscription is restricted to databricks tenant and users will not have permissions to edit or make any changes to this. If VNet Injection cannot be used for your scenario, please raise a support request and databricks team will assist you in getting those changes done.
Hope this helps! Please let us know for further details and we will be glad to assist.