I've tried to find some information regarding ExtremecloudIQ but all manuals I get are either out of date or not right. Will this be changed / updated?
You'll find the current ExtremeCloud IQ documentation within the product itself. You can use the content in the Deployment Guides section at docs.aerohive.com to plan a deployment. However, that content isn't updated to stay in sync with the product in every detail. We'll mark it "not current" to make that clear.
Information Development, Extreme Networks