The Sage Interface takes 10 mins to start, below are the check points it goes through in Event Viewer.
To view these click the windows search bar in the bottom left and type in Event Viewer > Expand the Windows Logs Section > Click Application
Note: You will need to refresh to see the new events, it shows '(!) New event available' at the top.
The last one is number 17 'successfully moved all records to sage'
If you get any errors for the SageInterfaceService at any point and you do not know what it means, please take a screenshot and send to firstname.lastname@example.org so we can advise further.