About the 6.x data that you must manually migrate to Symantec Management Platform 7.5
ITMS 6.x Migration
When you migrate from Notification Server 6.x to Symantec Management Platform 7.5, not all of the data is migrated with the migration wizard. You must manually migrate some data from the 6.x server to the 7.5 server. For some of the migrated data, you must also complete additional manual steps to make the data fully functional.