Archibus maxiCloud 
Instance concept

Archibus is a Multi-Project application, not Multi-Tenant by default, and has some limitations about customization.

Different projects can be implemented for the same Customer in one instance as far as it does not admit different customizations.

The Customer, in that case, can be an Outsourcing Service Provider, serving multiple End Users (Multi-Tenant).
The customization must be the same for all the projects in the Instance.
All the Projects of the Instance (of the same Customer or OSP) must be in the same Database.

Archibus maxiCloud Advantages

• Tomcat Application Server – In Layer 2
• An isolated database in Layer 3 
  More Secure than optiCloud Instance
• Up to 200 Concurrent Users by Server (recommended for best Performance in the Cloud)
• Unlimited Storage: 2/5 Gb for Database + 5/20 Gb for Files included by default + you can order additional storage
• Unlimited Scalability
  *Additional servers can be added to build a Project Farm (of Servers)