Does ITMS support an in-place upgrade of Microsoft operating systems?
No, ITMS does not support an in-place upgrade of Microsoft operating systems. This includes Managed systems, Site Server, Notification Server (SMP) or SQL Server.
If you need additional information we offer the following:
Migrating a stand-alone ITMS 8.1 RU7 instance to ITMS 8.5 RU4 using new hardware and a new host name for Notification Server
Other similar references:
What are the steps for Migrating an 8.x Notification Server to version 8.5?