From Daniel Bradley: Connect to Microsoft Graph PowerShell Using Certificates with Azure Automation (ourcloudnetwork.com) Certificate-based authentication for Microsoft Graph PowerShell enables you to authenticate to Microsoft Graph and run PowerShell scripts in the application context without having to store or retrieve a client secret. This can be beneficial in scenarios where you need to run a script from a privileged device but do not want to store a client secret within the code. Scenarios may include running a script from a privileged devices, or using Azure Automation.