alpha.telemetry.microsft.com resolves and has Microsoft name servers as SOA. I see no reason to conclude this is a typo. What evidence do you have?
Although alpha.telemetry.microsoft.com doesn't currently exist either, others do, e.g. us.vortex-win.data.microsoft.com resolves to a Microsoft-owned IP address.
It's a mistake in the report.
It is owned by Microsoft, registered by MarkMonitor (MarkMonitor is a legit company)