Data Loss Prevention (DLP) 14.6 MP2 was upgraded to DLP 15.1.
The previous version of Veritas Data Insight (DI), 3.0, is not compatible with DLP 15.1.
After upgrading DI to 6.1.0 the previously working custom attributes fail to load.
In System > Incident Data > Lookup Plugins, the Match AD for Attributes plugin shows a status of "Failed".
Data Insight 6.1.x
Had to reinstall the SSL certificate on the Enforce server.