Documentation
Install PSWinDocumentation.O365HealthService
Install PSWinDocumentation.O365HealthService from PowerShell Gallery.
Install the module from PowerShell Gallery:
Install-Module -Name PSWinDocumentation.O365HealthService -Scope CurrentUser
Import-Module PSWinDocumentation.O365HealthService
If you want HTML reports, install PSWriteHTML as well:
Install-Module -Name PSWriteHTML -Scope CurrentUser