NSFDB2 to NSF Migration Guide

NSFDB2 is dead as you know. If you go to Domino 8.5.2 you must read the TN 1443177

From the TN:

NSFDB2 is in limited availability starting with IBM® Lotus® Domino® 8.5.2.  The limited availability of NSFDB2 will require a software license key for customers to continue using the feature.  Access to the software license key will be restricted and supplied via an escalated PMR that is granted IBM Executive Approval.  Before upgrading to IBM® Lotus® Domino® 8.5.2 it is strongly recommended to migrate NSFDB2 databases back to NSF.....