This Knowledgebase article provides information about the MSEXCHANGEDIAGNOSTICS service failing to start after uninstalling Neverfail Heartbeat.
Note: Neverfail recommends that before attempting to uninstall Neverfail Heartbeat that you uninstall the Neverfail for IIS Plug-in using the Neverfail Heartbeat Management Client to prevent the occurrence of MSEXCHANGEDIAGNOSTICS service failing to start.
After uninstalling Neverfail Heartbeat and rebooting the server, MSEXCHANGEDIAGNOSTOCS service fails to start.
Neverfail Heartbeat is unable to reset some services to automatic due to permission limitations.
If the Neverfail Heartbeat for IIS Plug-in was not uninstalled using the Neverfail Heartbeat Management Client prior to uninstalling Neverfail Heartbeat, perform the following steps:
Neverfail for Exchange with
Microsoft Exchange 2013 on Windows Server 2008 R2 and Windows Server 2012