Hi Mostafa
The below links will help you with the attributes.
https://www.symantec.com/connect/forums/how-populate-web-prevent-incident-attributes-0
https://www.symantec.com/connect/forums/how-integrate-ldap-identify-user-attributes-dlp-web-unique-id-being-dynamic-ip
for bypassing the prevent action , There is a response call a user cancel which will show a popup to the user with allow or cancel , if the user clicked allow the action will not be blockd and an incident will be created on the DLP.
to apply the policy immediatly , please follow the below link and change the number accordingly
https://support.symantec.com/us/en/article.tech233788.html
below are the fields that you need to change it
EndpointCommunications.HEARTBEAT_INTERVAL_IN_SECONDS.int -- Default 270
EndpointCommunications.IDLE_TIMEOUT_IN_SECONDS.int -- Default 30
ServerCommunicator.CONNECT_POLLING_INTERVAL_SECONDS.int -- Default 900
Hope this solves your problem