CmisSync can be used with IBM FileNet Content Engine.
The procedure below has been tested with IBM FileNet Content Engine 5.2, please report success/failure for other versions, thank you!

1. Configure IBM FileNet Content Engine

In the IBM CMIS for FileNet configuration:

• Disable connection check
• Disable automatic deployment

The deploy manually.

2. Configure CmisSync

• Launch CmisSync
• In the taskbar icon menu, click Add a remote folder
• Specify as the URL: https://<Server>:9443/fncmis/resources/Service (replace <Server> with the hostname of your server).
• Complete the wizard
• CmisSync should now sync the content of your IBM FileNet Content Engine folder to your local computer.