On Symantec Endpoint Protection Manager (SEPM) home page "Latest on Manager" does not update or populate the definitions date when the SEPM is updated using JDB for Dark-Network Client only i.e. JDB for core 1.5 SDS definitions
SEP 14.x
Dark Network environment using JDB for Dark-Network Client only i.e. core 1.5 SDS definitions update.
It is an expected behavior, Core 3 SDS JDB (core3sds) is required in order to populate "Latest on Manager"
As a workaround, use JDB for both Core 3 SDS (core3sds) and Core 1.5 SDS definitions.