Description of the new feature
The documentation for New-AzKeyVaultCertificatePolicy has no examples nor details how to create a certificate with one or multiple SANs.
Also it doesn't explain that the DNS parameter actually means SAN. There are no results if you search for "SAN" or "alternative" on the page.
P.S.
Docs for PowerShell doesn't allow to open a GitHub issue like what for instance Service Fabric does.