What could cause a '503 - Service Unavailable' HTTP error when requesting element log files? On one of our systems, we are facing this error for all elements, also when directly browsing to the log file URL while being logged in to the DataMiner server which is hosting the element.
The problem persists after restarting both IIS and the DataMiner Agent.
Is this happening on a Windows Server 2016 Version 1709?
If so, this KB of Microsoft might help you out: https://support.microsoft.com/en-us/help/4050891/error-http-503-and-was-event-5189-from-web-applications-on-windows-10