OpManager Enterprise Edition is a better alternative for MSP Center Plus v7.x as it is built on the same OpManager platform on which MSP Center Plus was also built. With its Central-Probe architecture, it offers almost all the features of MSP Center Plus except Customer login. However, you can provide read only access to your customers for viewing their devices alone with the help of business views.
After deploying the OpManager EE Central and Probe servers, from the probe web client
Discover the devices
Create a business view
Group devices of a customer under it
Create a user login with read-only access for that business view
Give the login to the customer. He can view only his devices, alarms and reports.
Go through the following video for better understanding