The answer would be a unqualified YES. The DMM is designed to manage hundreds and even thousands of DMP end points. As long as the DMM server can see and shake hands with the IP addresses and the DMPs across the global network then you are viable.
Tom is very correct. There are many steps you need to consider in deploying a media system of this size. I would strongly agree with Tom that you need to sit down and discuss your content and content strategy and tactics with all your stake holders. I would also also discuss with your IT team or Cisco AM about performing a Medianet assessment based on your PIN (places in the network) locations that you will need to be able to reach on a global scale. This assessment will tell you what kind of media you will be able to transport across your network and what will need to be done to make your network video ready so you can take full advantage of what the DMS offers in its features. I would strongly suggest engageing with a Cisco DMS authorized partner that can give you the complete end to end support you will need to deploy a media delivery system of this scale.
Are you getting this error “Installer User Interface Mode Not Supported. The installer cannot run in this UI mode. To specify the interface mode, use the -i command-line option, followed by the UI mode identifier. The value UI mode identifiers...
The below trick might come handy when you have to add a new node to a cluster but you don't have or is unsure of the security password for the publisher. This procedure has been around for ages.
1) Login into the CLI of the Publisher.