Email Endpoint Block Policy does not show a pop-up block when sending emails, and allows email to leave without blocking.
The edpa logs will display the following error:
"11/02/2012 09:40:00 | 10884 | INFO | otlkplginst | Repair: failure Error=6"
Explanation of the error :- 11/02/2012 09:40:00 | 10884 | INFO | otlkplginst | Repair: failure Error=6
If the DLP agent software is unable to repair the outlook plugin " otlkplginst " you will need to reinstall or upgrade the DLP Endpoint agent.
AgentInstaller.msimanually to repair the agent installation to fix the issue, after which the Endpoint Block Policy should work successfully (i.e. the agent displays the pop-up block and blocks the confidential email.)