Migration: A migration is when you install the latest version of the IT Management Suite solutions on a new server, and then migrate the data from the earlier ITMS solutions to the latest version of the application.
Upgrade: An upgrade is when you install the latest version of ITMS on the same hardware, server operating system, and database.
You must migrate the Notification Server 6.x or 7.0 data to either Notification Server 7.1 SP2 or Notification Server 7.5. After migrating the data, you must first upgrade to either ITMS 7.1 SP2 MP1.1 or ITMS 7.5 HF6 depending on the path you choose and then upgrade to ITMS 7.5 SP1.
The following diagram gives an overview of the migration and upgrade process:
You can use the following reference documents: