How would i know "updated by " is coming which part of servicenow.

[subbarayudu]

Here Updated by is srcDataImport, if it is a schedule import how can i get that which is updating.its updating some records  daily. 

[Mark Manders]

Look at the sysauto table and add the 'run as' field to the list. There you can see the user that is running the job.