1 - Enterprise Multi-App Admin - manage all apps in one place. What is this?
Mendix created a platform from which users of multiple applications can be managed. e.g. provide them roles and access to applications.
2 - App Monitoring - I assume this is the old monitoring where you could see the CPU usage, Memory, number of visits, Environment Disk Usage, Database Disk Usage, etc? If so, how will I know if I'm almost reaching my 100 MB of disk space?
My guess is mendix marketing department will let you know in time ;]
3 - Multi App Resource Management. What is this?
Dunno about that one either.
4 - Third Party Identity Management Integration - is this for your applications? Can someone give me an example for this feature?
This looks like single sign on for multiple apps to me. I guess it is related to the first one.
5 - 100MB of file storage space. What is this file storage space? Images and documents you upload to the Mendix Portal (where you collaborate with the business). Of do applications have file storage space?
This should be per sandbox just as question 7.
6 - 100MB database size per sandbox - Does this mean that the more sandboxes you have, the more space you have? Or the 100 MB is the limit of all your sandboxes combined?
You kind of answered this one yourself. 100MB per sandbox is 100MB per sandbox ^^
7 - Multi-tenancy - this feature is actually allowed in the Community. I never understood it very well. What does Mendix automate/help you for building multi-tenant apps? Do you have to implement the logic to make your applications multi-tenant? Or does Mendix give you some kind of automation?
As far as i know Mendix does not really help you with this.