For certain applications, you may wish to prevent synchronization, since it may be difficult (or even impossible) for the SAP transaction to reconstruct the state it had in a previous screen.
In such cases, disabling synchronization lets you avoid states that the Web transaction cannot recover.
To disable synchronization you can:
Set the ~SyncBehaviour parameter in the service file to NoResync. In this case, the Internet Transaction Server (ITS) displays a message whenever you try to navigate between pages.
Confirm the message, after which the ITS redisplays the screen from which the navigation was attempted. In this screen, you should always provide other navigation options.