ProfessorI think LM had per-user checks in the legacy collector-based DataSources but it would frequently fail. For many environments it would take too long to collect the data due to the number of users and it would time out.
"Exchange Online: Initially created to monitor Exchange Online mailbox statistics, this DataSource was removed from the Office 365 monitoring package in April 2020 due to timeout issues stemming from slow Microsoft PowerShell module performance. We are currently researching alternative approaches to retrieving the metrics."
P.S. I thought that was the point of moving to a SaaS version to help fix these, but there isn't a mention of that.
