Use the Powershell script Save_SQL_Agent_Alerts_as_JSON_Template.ps1 against your SQL server with the most Agent Alerts, it will create a JSON file with all your Alerts to be used as a template to deploy to all your other servers with the next script

On Each Server you want to enable with your stock Agent Alerts JSON template, run the Powershell script **Deploy_SQL_Agent_Alerts_from_JSON_Template.ps1 **