Funambol is a Java SyncML server which can be used to synchronized external datasources with a set of mobile devices.

To connect ScalableOGo using Funambol you can use the Funambol SOGo Connector which is fast and directly attaches to the SOGo database.

Another option is the Funambol GroupDAV Connector which can be used with other servers too.

ActiveSync

The other option to synchronize mobile devices is to use ZideOne the Outlook plugin in combination with ActiveSync.