How to Automate a Script with MFA in Task Scheduler?

It's best to use certificate-based authentication if you can. Alternatively, you could go with a client ID and secret setup in Azure. There are ways to secure these credentials, such as using encrypted clixml files.

Make an app registration in Azure, generate a secret, and then use the tenant ID along with the secret in your script. It's pretty straightforward and won't require MFA.

To run your script without MFA, the first step is to register an app in Azure and assign it the necessary permissions. Use an app secret or a certificate to authenticate in your script, which will allow you to run it automatically without MFA interruptions.

Have you considered Azure Automation? It requires an Azure subscription, but you can run your scripts in the cloud using a Managed Identity. This approach is designed for unattended execution, so you won’t face any MFA issues.

You can register your app in Entra and use certificates for authentication. This way, your script can run on schedule without the MFA prompts. I recommend checking out some detailed guides, like the one I found on connecting to Microsoft Graph with certificates.