A cloud-based identity and access management service for securing user authentication and resource access
Hello @Andrew Brehm ,
Thanks for reaching out.
PowerShell management is quite constrained in Multi-Factor Authentication Server (MFA on-premises server). Here are a few examples for your convenience.
Sample for querying users and initiating a callout.
https://blog.kloud.com.au/2016/08/16/connecting-to-and-using-the-azure-mfa-web-service-sdk-server-soap-api-with-powershell/
Sample for adding users:
https://blogs.technet.microsoft.com/cloudpfe/2018/04/26/managing-azure-mfa-server-with-powershell/
Hope this was helpful.
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