When trying to export the total number of agents that a DLP system has in DLP to a file from the Agent Summary Report in the Enforce console the default limit is set 30000.
Locate the Manager.properties file on your Enforce Server.
Default Locations (Substitute your DLP version):
Windows: C:\Program Files\Symantec\DataLossPrevention\EnforceServer\[DLP Version]\Protect\config\manager.properties
Linux: /opt/Symantec/DataLossPrevention/EnforceServer/[DLP Version]/Protect/config/manager.properties
Please be sure to create a backup of the Manger.properties file before making any edits in case you need to roll back.
Locate and edit the following property:
# The maximum number of Agents than can be allowed to export, print or mail from Agents Summary Report or Agents Legacy Summary Report.
com.vontu.manager.advanced.summary.export_or_print_or_mail.maxrows = 30000
Change the 30000 value to a value that will reflect accurately the total number of agents that exist within the DLP system. Example - 40000.
After making the change save the file and restart the DLP Manager Service
You will now be able to export a report of 40,000 agents successfully.