For our SMB customers, 1Centre is currently integrated with Xero and Unleashed. 

Once an application is approved the applicable fields will be pushed into these systems creating your customer.

To turn on go to Add-ons>connected apps>input your details which will validate the connections.

For consideration:
If you use more than two integrations consider what your workflow might look like. 

You may not need to integrate both of these systems. 

For example - 1Centre > Xero > Unleashed. 

So rather than integrating from 1Centre to both of these systems, you may only need to integrate with one.