You may need to change the start-up type of your Sync App to a Console or Service (vice/versa) Application in the instance that you are receiving an error message, or the app was not installed correctly.
Sage 50 users
QuickBooks Desktop users
How to change the Sync App's start-up type
To change the start-up type of your Sync App, please do the following:
Open your Task Manager (this is a pre-installed app on every PC), select the Services tab at the top, then click on Open Services at the bottom of that window.
When the Services Window opens up:
Right-click on the AutoEntry.DesktopSync.Service and select Stop.
Once stopped, right-click on AutoEntry.DesktopSync.Service again and select Properties.
Under Startup Type select Disabled
Open the Sync App again and ensure you are able to view your company list
The Sync App is now running as a Console application