Enumeration KnownHealthCheckName

Verifies that the AppAttachService is healthy (there were no issues during package staging). The AppAttachService is used to enable the staging/registration (and eventual deregistration/destaging) of MSIX apps that have been set up by the tenant admin. This checks whether the component had any failures during package staging. Failures in staging will prevent some MSIX apps from working properly for the end user. If this check fails, it is non fatal and the machine still can service connections, main issue may be certain apps will not work for end-users.

Verifies the SessionHost is joined to a domain. If this check fails is classified as fatal as no connection can succeed if the SessionHost is not joined to the domain.

Verifies the domain the SessionHost is joined to is still reachable. If this check fails is classified as fatal as no connection can succeed if the domain the SessionHost is joined is not reachable at the time of connection.

Verifies the SessionHost is not experiencing domain trust issues that will prevent authentication on SessionHost at connection time when session is created. If this check fails is classified as fatal as no connection can succeed if we cannot reach the domain for authentication on the SessionHost.

Verifies the FSLogix service is up and running to make sure users' profiles are loaded in the session. If this check fails is classified as fatal as even if the connection can succeed, user experience is bad as the user profile cannot be loaded and user will get a temporary profile in the session.

Verifies the metadata service is accessible and return compute properties.

Verifies that the required Geneva agent is running. If this check fails, it is non fatal and the machine still can service connections, main issue may be that monitoring agent is missing or running (possibly) older version.

Verifies the value of SecurityLayer registration key. If the value is 0 (SecurityLayer.RDP) this check fails with Error code = NativeMethodErrorCode.E_FAIL and is fatal. If the value is 1 (SecurityLayer.Negotiate) this check fails with Error code = NativeMethodErrorCode.ERROR_SUCCESS and is non fatal.

Verifies that the SxS stack is up and running so connections can succeed. If this check fails is classified as fatal as no connection can succeed if the SxS stack is not ready.

Verifies that the required WVD service and Geneva URLs are reachable from the SessionHost. These URLs are: RdTokenUri, RdBrokerURI, RdDiagnosticsUri and storage blob URLs for agent monitoring (geneva). If this check fails, it is non fatal and the machine still can service connections, main issue may be that monitoring agent is unable to store warm path data (logs, operations ...).

Verifies whether the WebRTCRedirector component is healthy. The WebRTCRedirector component is used to optimize video and audio performance in Microsoft Teams. This checks whether the component is still running, and whether there is a higher version available. If this check fails, it is non fatal and the machine still can service connections, main issue may be the WebRTCRedirector component has to be restarted or updated.