CA Data Protection 15.2 does not support Exchange Server 2016 in the general release (GA) version.
Exchange Server 2016 has dropped support for MAPI\CDO which Data Protection leveraged handle the TNEF decoding of Exchange Messages. As a consequence CA has developed a new approach and released a new installer as a hotfix to provide ongoing support.
Data Protection 15.2 - Enhancements to Support Exchange 2016
Included in this new Data Protection Exchange Server Agent installer for Exchange 2016 is a DLL "WgnTNEFlibrary.dll" which does not display any file properties.
The file is missing the following information in >Properties->Details
This was an oversight when the fix was published.