Upgrade Path 7.1 to 7.5

Good afternoon,

Can anyone tell me if there is ANY documentation for upgrading to  7.5 from our current version which is 7.1. We're going to upgrade the entire suite, if I understand correctly. The management console and all that entails along with our deployment solution.

I opened a case because I couldn't find anything, and they closed it without any resolution. When I tried to "Chat" with a non-technical person in regards to upgrading, they didn't understand...help.

Thank you