The initial value of the StopAfter property of the SmartBusinessEntityAdapter is defined in the products.i file:
/**
* Purpose: Value for StopAfter to be passed to the Service Interface
* Notes: Allows limiting the execution time of queries executed on the backend
* Not supported on OpenEdge 10.2B
* The default value for this property may be set using the DefaultStopAfter
* preprocessor variable in Consultingwerk/products.i
*/
DEFINE PUBLIC PROPERTY StopAfter AS INTEGER INITIAL &IF DEFINED (DefaultStopAfter) NE 0 &THEN {&DefaultStopAfter} &ELSE 0 &ENDIF NO-UNDO
GET.
SET.
Alternatively it's using the DefaultStopAfter value from the .applicationsettings. But this is just a property default - it won't override a setting defined in a Form.
To enforce the same value to all instances, I would recommend to override the OnNewFetchDataRequest method of the SmartBusinessEntityAdapter and set the value there.