Scalability is easy enough with the product although you do have to roll out the agents one by one per server to be protected, unless on a hypervisor platform.

We currently have three staff members in our organization using Carbonite Server. We are not really putting scalability to the test and probably will not as far as the number of users in the near future.  

The solution is scalable.

The solution is scalable enough for our purposes. It's all on the licensing part, so you just add the license and the you can scale. There are no issues with that. On the licensing bundle we have sold about 3,000 or more licenses. And then we have about 15 end users, all admins or integrators. We have one person for deployment and maintenance, and one person for admin.